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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html>
<html>
<head>
<title>SR-71 - Section II: Normal Procedures</title>
<link type="text/css" rel="stylesheet" href="sr71.css"></link>
</head>
<body>
<section>
<h1>Introduction</h1>
<p>The following procedures provide an amplified listing which applies to the SR-71A/B aircraft.</p>
<h2>Symbol Coding</h2>
<ol class="list-number">
<li>
<p>Steps without special notations apply to the forward cockpit of all aircraft.</p>
</li>
<li class="applic-SR71A-aft">
<p>Steps with an enclosed number apply to the aft cockpit of the SR-71A.</p>
</li>
<li class="applic-all-all">
<p>Steps preceded by the ▲ symbol apply to both cockpits of all aircraft.</p>
</li>
<li class="applic-all-forward-SR71B-aft">
<p>Steps preceded by a T apply to the forward cockpit of all aircraft as well as the aft cockpit of the SR-71B.</p>
</li>
<li class="applic-SR71AB-aft">
<p>
<span>Steps with an enclosed T</span>
<u>and</u>
<span>step number apply to the aft cockpit of SR-71A/B.</span>
</p>
</li>
<li class="applic-SR71B-aft">
<p>Steps preceded by an enclosed T apply only to the aft cockpit of the SR-71B.</p>
</li>
</ol>
<p>The same system is used for abbreviated checklists which are provided separately for the Pilot and RSO. Interior Preflight checklists are provided for each crew position. From Starting Engines on, checklists are common.</p>
</section>
<section>
<h1>Crew Coordination</h1>
<p>Crew coordination is paramount to mission success and safety of flight. Communication between crewmembers should be continuous when accomplishing checklists. Verbal coordination between crewmembers is required prior to:</p>
<ol class="list-alpha">
<li>
<p>Going off interphone.</p>
</li>
<li>
<p>Going off aircraft oxygen system or opening faceplate.</p>
</li>
<li>
<p>Changing the programmed mission or steering reference points, changing the pilot's ANS distance display mode (DP/TURN), or changing navigational system mode.</p>
</li>
<li>
<p>Changing the attitude reference.</p>
</li>
<li>
<p>The pilot pressing the indicator and warning lights test button.</p>
</li>
<li>
<p>Autopilot engagement or disengagement (including KEAS HOLD, MACH HOLD, and AUTO NAV).</p>
</li>
<li>
<p>Change of fuel panel settings or fuel crossfeed or transfer operation.</p>
</li>
</ol>
<p>The RSO must monitor aircraft attitude, altitude, and airspeed and advise the pilot if a potentially dangerous situation exists. This is particularly important during critical phases of flight involving substantial changes in aircraft attitude, altitude, and speed.</p>
<p>It may be advantageous to use the interphone system HOT MIC feature for crew communication during some flight phases.</p>
</section>
<section>
<h1>Preparation for Flight</h1>
<h3>Flight Restrictions</h3>
<p>Refer to <a href="5.htm">Section V</a> for operating restrictions and limitations.</p>
<h3>Flight Planning</h3>
<p>Refer to <a href="appendix.htm">Appendix I</a>.</p>
<h3>Takeoff and Landing Data</h3>
<p>Refer to <a href="appendix.htm">Appendix I</a>.</p>
<h3>Weight and Balance</h3>
<p>For detailed loading information, refer to Handbook of Weight and Balance data.</p>
<p>Before each flight, check takeoff and anticipated landing gross weights and weight-and-balance clearance (Form 365F or local substitute). Note weight and moment values programmed for CG mode selector box.</p>
<div class="note">
<p>Recommended weight and/or C.G. limits can be exceeded by seemingly normal loading arrangements. Check loading documents carefully.</p>
</div>
<h3>Aircraft Status</h3>
<p>Refer to AF Form 781 for engineering, servicing, and equipment status.</p>
</section>
<section data-title="Preflight Check">
<h1>Preflight Check - SR-71A/B</h1>
<h3>Exterior Inspection</h3>
<p>Because it is not practical for the flight crew to perform an exterior inspection while wearing pressure suits, the exterior inspection should be accomplished by other qualified personnel.</p>
<section data-title="Before Entering Cockpit">
<h3>Before Entering Cockpit - SR-71A/B</h3>
<ol class="list-number">
<li class="applic-all-all">
<p>Ejection seat and canopy pins - Installed</p>
</li>
<li class="applic-all-all">
<p>Circuit breakers - Checked in (set).</p>
<p>If any DAFICS computer circuit breakers are open, those in the aft cockpit should be reset approximately one minute prior to resetting those in the front cockpit.</p>
</li>
<li class="applic-all-all">
<p>Canopy handles - Checked.</p>
<p>Fwd cockpit - Locked forward.</p>
<p>Aft cockpit - Aft position.</p>
</li>
<li>
<p>Mode selector reference moment setting - Checked.</p>
</li>
<li class="applic-all-all">
<p>Publications - Checked.</p>
</li>
</ol>
</section>
<section data-title="Front Cockpit Interior Check">
<h3>Front Cockpit Interior Check - SR-71A/B</h3>
<p>Check personal equipment hookup. (See <a href="#fig-2-1">Figure 2-1</a>). Hookup will be performed by personal equipment personnel.</p>
<figure id="fig-2-1">
<img src="images/2-1_1.jpg" alt="" />
<figcaption>Figure 2-1 (Sheet 1 of 2): Personal Equipment Hookup - Pressure Suit</figcaption>
</figure>
<figure id="fig-2-1-2">
<img src="images/2-1_2.jpg" alt="" />
<figcaption>Figure 2-1 (Sheet 2 of 2): Personal Equipment Hookup - Shirt Sleeve Flight</figcaption>
</figure>
<h4>Left Console - Pilot</h4>
<ol class="list-number">
<li>
<p>Throttle restart arming switch - NORM.</p>
</li>
<li>
<p>Liquid oxygen quantity indicators - Check SYS 1, SYS 2, and STANDBY.</p>
<ol class="list-alpha">
<li>
<p>LOX QTY selector switch - SYS 1, IND 1.</p>
</li>
<li>
<p>LOX quantity gage - Check both full.</p>
</li>
<li>
<p>LOX QTY selector switch STANDBY, IND. 1.</p>
</li>
<li>
<p>LOX quantity gage - Check No. 1 full.</p>
</li>
<li>
<p>LOX QTY selector switch - SYS 1, IND 1.</p>
</li>
</ol>
</li>
<li>
<p>Light rheostat switches - Checked.</p>
</li>
<li>
<p>Thunderstorm lights switch - As desired.</p>
<p>At night, use of these lights can facilitate the P.E. Hookup.</p>
</li>
<li>
<p>Emergency ICS switch - OFF. (Trainer only)</p>
</li>
<li>
<p>Standby oxygen system switches - OFF.</p>
</li>
<li>
<p>Control transfer panel lights - All on. (Trainer only)</p>
<p>Cycle control transfer switches if needed to obtain control in the forward cockpit and illuminate all four transfer lights.</p>
</li>
<li>
<p>UHF radio - ON and set.</p>
<ol class="list-alpha">
<li>
<p>Mode - INT.</p>
</li>
<li>
<p>VOL - Nearly full clockwise.</p>
</li>
<li>
<p>PWR - Set.</p>
</li>
<li>
<p>Frequency - Set.</p>
</li>
<li>
<p>Function select - Set.</p>
</li>
</ol>
</li>
<li>
<p>Oxygen control panel - Set.</p>
</li>
<li>
<p>Aft bypass position lights - Checked.</p>
<p>Press to test.</p>
</li>
<li>
<p>L and R aft bypass switches - CLOSE.</p>
</li>
<li>
<p>EGT trim switches - AUTO.</p>
</li>
<li>
<p>Map projector controls - Set.</p>
</li>
<li>
<p>Throttles - OFF.</p>
</li>
<li>
<p>Throttle friction lever - Set.</p>
</li>
<li>
<p>Throttle restart switch - Cycle to OFF.</p>
<p>Slide the switch to the forward bypass open and then to the restart position. Check that the MANUAL INLET and CAUTION lights illuminate. Return the switch to OFF.</p>
</li>
<li>
<p>TEB counters - 16.</p>
</li>
</ol>
<h4>Instrument Panel - Pilot</h4>
<ol class="list-number">
<li>
<p>Cockpit pressure dump switch - OFF.</p>
</li>
<li>
<p>Bay Air switch - ON.</p>
</li>
<li>
<p>Manifold temperature switch - AUTO.</p>
</li>
<li>
<p>Landing/Taxi light switch - OFF.</p>
</li>
<li>
<p>Suit heat rheostat - OFF.</p>
</li>
<li>
<p>Face heat rheostat - Set.</p>
<p>Use face heat at all times. Adjust for comfort.</p>
<div class="caution">
<ul class="list-circle">
<li>
<p>Do not use the HIGH face heat position when equipped with the PPG (glass) visor except for emergency heating. Continuous use of the HIGH position may delaminate the visor.</p>
</li>
<li>
<p>The face heat switch should not be set above 5 with the visor raised, or the faceplate may be damaged.</p>
</li>
</ul>
</div>
</li>
<li>
<p>Cockpit temperature control rheostat - 12 o'clock position.</p>
<p>Cockpit temperature control may have to be adjusted for varying ambient conditions.</p>
</li>
<li>
<p>Temperature indicator selector switch - R BAY.</p>
</li>
<li>
<p>L and R refrigeration switches - OFF.</p>
</li>
<li>
<p>Cockpit temperature mode selector and override switch - AUTO.</p>
</li>
<li>
<p>Defog switch - CLOSED.</p>
</li>
<li>
<p>Brake switches - Set.</p>
<ol class="list-alpha">
<li>
<p>Set ANTI-SKID ON, or ALT STEER & BRAKES, respectively, depending on whether the left or right engine is to be started first.</p>
</li>
<li>
<p>Set WET/DRY switch DRY.</p>
</li>
</ol>
</li>
<li>
<p>Indicators and warning lights test button - Press.</p>
<ol class="list-alpha">
<li>
<p>Spike and forward bypass position indicators full counterclockwise, (0 inches and 100% open).</p>
</li>
<li>
<p>LN<sub>2</sub> and LOX quantity indicators decrease to zero.</p>
</li>
<li>
<p>All cockpit caution and warning lights illuminate.</p>
</li>
<li>
<p>Gear warning tone sounds in headset.</p>
</li>
<li>
<p>All CIP indicator needles decrease to zero.</p>
</li>
<li>
<p>Fuel quantity indicator needle moves to zero. The C.G. indicator indicates 14%.</p>
</li>
<li>
<p>The annunciator panel C.G. warning light remains illuminated until C.G. indicator needle is above 17%.</p>
</li>
</ol>
</li>
<li>
<p>Fuel derich switch - ARM.</p>
</li>
<li>
<p>Landing gear lever - DOWN.</p>
</li>
<li>
<p>Cabin altimeter - Field elevation.</p>
</li>
<li>
<p>Standby attitude indicator - Erecting.</p>
<p>If required, pull the cage knob to erect the instrument, then release the knob. The instrument will erect and then seek 7° nose-down and 0° roll (if the aircraft is level).</p>
<div class="note">
<p>A jitter of ±1/2° in the pitch axis is acceptable and may occur at any pitch angle.</p>
</div>
</li>
<li>
<p>Angle of attack indicator - Checked.</p>
<p>Check OFF flag out of view and AOA indicates zero.</p>
</li>
<li>
<p>Drag chute control - Checked in, light off.</p>
<p>Verify that the drag chute handle is in the full forward detent JETTISON position and that the DRAG CHUTE UNSAFE annunciator light is not illuminated.</p>
<div class="warning">
<p>The red marking on the drag chute handle shaft must not be visible.</p>
</div>
</li>
<li>
<p>Compressor inlet temperature (CIT) gage - Checked.</p>
<p>Check needles together and ambient temperature indicated.</p>
</li>
<li>
<p>Airspeed/Mach Meter - Checked.</p>
<ol class="list-alpha">
<li>
<p>Limit hand setting - 460 KIAS.</p>
</li>
<li>
<p>Airspeed indication - 60 knots or less.</p>
</li>
<li>
<p>Mach number indication - Right half of window blanked. Disregard Mach reading in left half of window.</p>
</li>
</ol>
</li>
<li>
<p>RSO EJECTED light - Press to test.</p>
</li>
<li>
<p>Compressor inlet pressure (CIP) gage - Checked.</p>
<p>L and R needles and reference pointer together and indicating barometric pressure.</p>
</li>
<li>
<p>APW switch - PUSHER/SHAKER.</p>
<p>With ANS, INS, or TACAN selected on the Display Mode Selector switch, the ADI glide slope pointer should deflect to the lowest dot on the glide slope displacement scale. The pointer may fluctuate if there is fuselage motion in the pitch axis.</p>
</li>
<li>
<p>Spike and forward bypass position indicators - Checked.</p>
<ol class="list-alpha">
<li>
<p>Spikes - 0 in. aft.</p>
</li>
<li>
<p>Forward bypass - Open 100%.</p>
</li>
</ol>
</li>
<li>
<p>Accelerometer - Reset.</p>
</li>
<li>
<p>L and R spike and forward bypass controls - Cycle, then AUTO.</p>
<p>Check knobs for security. Check that the MANUAL INLET and CAUTION lights are on when not in AUTO.</p>
</li>
<li>
<p>L and R restart switches - Cycle to RESTART ON, then off, individually.</p>
<p>Check operation of the MANUAL INLET light when in RESTART ON.</p>
</li>
<li>
<p>Projector - Checked.</p>
<ol class="list-alpha">
<li>
<p>Verify proper loading.</p>
</li>
<li>
<p>Check controls and lights.</p>
</li>
<li>
<p>Illumination as desired.</p>
</li>
</ol>
</li>
<li>
<p>Surface limiter release handle - Pulled, and SURFACE LIMITER caution light off.</p>
</li>
<li>
<p>Pitot heat switch - OFF.</p>
<p>Check that the PITOT HEAT caution light is on.</p>
</li>
<li>
<p>Windshield rain removal and de-ice switch - OFF.</p>
</li>
<li>
<p>Trim power switch - ON.</p>
</li>
<li>
<p>A, B and M CMPTR RESET switches - Normal (Guard down).</p>
</li>
<li>
<p>Clock - Set.</p>
</li>
<li>
<p>Altimeter - Set.</p>
<div class="note">
<p>It is possible to rotate the barometric set knob through full travel so that the 10,000-foot pointer is 10,000 feet in error. Check that the 10,000-foot pointer is reading correctly.</p>
</div>
</li>
<li>
<p>Vertical velocity indicator - Checked.</p>
<p>Check for zero indication.</p>
</li>
<li>
<p>TACAN control transfer switch - CONT illuminated (SR-71 A).</p>
<p>Press to obtain control in the forward cockpit.</p>
</li>
<li>
<p>Engine instruments - Checked.</p>
</li>
<li>
<p>Igniter purge switch - Off.</p>
</li>
<li>
<p>Liquid nitrogen quantity gages - Checked.</p>
</li>
<li>
<p>Forward transfer switch - OFF.</p>
</li>
<li>
<p>Emergency fuel shutoff switches - Fuel on (guards safety wired down).</p>
</li>
<li>
<p>Fuel dump switch - OFF (guard down).</p>
</li>
<li>
<p>Battery - BAT.</p>
</li>
<li>
<p>Emergency AC bus switch - NORM.</p>
</li>
<li>
<p>Generators - OFF.</p>
</li>
<li>
<p>Instrument inverter switch - NORM.</p>
<p>Place switch to TEST and check that INST INVERTER ON light illuminates, then set to NORM.</p>
</li>
</ol>
<h4>Right Console - Pilot</h4>
<ol class="list-number">
<li>
<p>PVD - OFF.</p>
</li>
<li>
<p>ILS power switch - ON.</p>
</li>
<li>
<p>SAS - OFF.</p>
</li>
<li>
<p>SAS lights - Test.</p>
<p>All SAS panel warning lights should illuminate when the test switch is depressed including the DAFICS BIT TEST and FAIL lights.</p>
</li>
<li>
<p>Autopilot - OFF.</p>
<p>Press the right console A/P OFF switch and check that the A/P OFF light is on.</p>
</li>
<li>
<p>TACAN mode selector - T/R.</p>
</li>
<li>
<p>Interphone control panel - Set.</p>
</li>
<li>
<p>IGV Lockout switches - NORM.</p>
</li>
<li>
<p>Cockpit pressure selector switch - Set.</p>
<p>Select either the 10,000 or 26,000 foot setting. The 26,000 foot setting is normally desired.</p>
</li>
<li>
<p>VHF radio - TR and set.</p>
<ol class="list-alpha">
<li>
<p>Mode select switch - As desired.</p>
</li>
<li>
<p>Frequency control/Emergency select switch - PRE or MAN.</p>
</li>
<li>
<p>Frequency - Set.</p>
</li>
<li>
<p>Volume control - Nearly full clockwise.</p>
</li>
</ol>
</li>
<li>
<p>Canopy seal - OFF.</p>
</li>
</ol>
</section>
<section>
<h3>Trainer Aft Cockpit Interior Check</h3>
<h4>Left Console - Instructor Pilot</h4>
<ol class="list-number">
<li>
<p>Thunderstorm lights switch - As desired.</p>
<p>At night, use of these lights can facilitate the P.E. Hookup.</p>
</li>
<li>
<p>Light rheostat switches - Checked.</p>
</li>
<li>
<p>Throttle restart arming switch - NORM.</p>
</li>
<li>
<p>UHF modulator/demodulator (Modem) control - Set.</p>
<ol class="list-alpha">
<li>
<p>a. Code selector switches - Set.</p>
</li>
<li>
<p>b. Range address switch - Set.</p>
</li>
</ol>
</li>
<li>
<p>Oxygen control panel - Set.</p>
</li>
<li>
<p>HF radio - OFF and set.</p>
</li>
<li>
<p>Interphone control panel - Set.</p>
</li>
<li>
<p>UHF radio - ON and set.</p>
</li>
<li>
<p>INS - Check aligning.</p>
<ol class="list-alpha">
<li>
<p>Check present position.</p>
</li>
<li>
<p>Function switch - NORM or STOR HDG.</p>
<div class="note">
<p>INS must be in NAV to obtain a valid mag heading.</p>
</div>
</li>
<li>
<p>Check/enter desired DP's.</p>
</li>
<li>
<p>Adjust INS segment lights as desired.</p>
</li>
</ol>
</li>
<li>
<p>Aft bypass position lights - Checked.</p>
<p>Press to test.</p>
</li>
<li>
<p>L and R aft bypass switches - FWD CONT.</p>
</li>
<li>
<p>EGT trim switches - HOLD & FWD CONT.</p>
</li>
<li>
<p>Map projector controls - Set.</p>
</li>
<li>
<p>Throttles - OFF.</p>
</li>
<li>
<p>Throttle friction lever - Set.</p>
</li>
<li>
<p>Throttle restart switch - Cycle to OFF.</p>
<p>Check that the MANUAL INLET and CAUTION lights are on and the SPIKE DOOR transfer light on the control transfer panel is on when the throttle restart switch is not in the OFF position.</p>
</li>
<li>
<p>Emergency ICS switch - OFF.</p>
</li>
<li>
<p>UHF TRANS switch - Set.</p>
</li>
<li>
<p>Control transfer panel - Cycle to forward control.</p>
<p>Verify lights illuminate when aft cockpit has control and then transfer to forward control.</p>
</li>
<li>
<p>Cockpit air handle - Off (forward).</p>
</li>
</ol>
<h4>Instrument Panel - Instructor Pilot</h4>
<ol class="list-number">
<li>
<p>Indicators and warning lights test button - Press.</p>
<ol class="list-alpha">
<li>
<p>Spike and forward bypass position indicators full counterclockwise (0 inches and 100% open).</p>
</li>
<li>
<p>LOX quantity indicators decrease to zero.</p>
</li>
<li>
<p>All cockpit caution and warning lights Illuminate.</p>
</li>
<li>
<p>Gear warning tone sounds in both headsets.</p>
</li>
<li>
<p>All CIP indicator needles decrease to zero.</p>
</li>
<li>
<p>Fuel quantity indicator needle moves to zero. The C.G. indicator indicates 14%.</p>
</li>
</ol>
</li>
<li>
<p>Brake switch - OFF.</p>
</li>
<li>
<p>Landing gear switch - OFF.</p>
</li>
<li>
<p>Fuel derich switch - ARM.</p>
</li>
<li>
<p>Drag chute switch - OFF, light off.</p>
<p>Check that the yellow dot in the end of the switch is visible with the guard down and the DRAG CHUTE UNSAFE annunciator light is not illuminated.</p>
</li>
<li>
<p>Airspeed/Mach Meter - Checked.</p>
<ol class="list-alpha">
<li>
<p>Limit hand setting - 460 KIAS.</p>
</li>
<li>
<p>Airspeed indication - 60 knots or less.</p>
</li>
<li>
<p>Mach number indication - Right half of window blanked. Disregard Mach reading in left half of window.</p>
</li>
</ol>
</li>
<li>
<p>Liquid oxygen quantity indicators - Check SYS 1, SYS 2 and STANDBY.</p>
<p>Coordinate with forward cockpit to check System 1 and Standby system.</p>
</li>
<li>
<p>Clock - Set.</p>
</li>
<li>
<p>Cabin altimeter - Field elevation.</p>
</li>
<li>
<p>Accelerometer - Reset.</p>
</li>
<li>
<p>Compressor inlet pressure (CIP) gage - Checked.</p>
<p>L and R needles and reference pointer together and indicating barometric pressure.</p>
</li>
<li>
<p>Compressor inlet temperature (CIT) gage - Checked.</p>
<p>Check needles together and ambient temperature indicated.</p>
</li>
<li>
<p>Spike and forward bypass position indicators - Checked.</p>
<ol class="list-alpha">
<li>
<p>Spikes - 0 in. aft.</p>
</li>
<li>
<p>Forward bypass - Open 100%.</p>
</li>
</ol>
</li>
<li>
<p>L and R spike and forward bypass controls - Cycle, then AUTO.</p>
<p>Check knobs for security. MANUAL INLET and CAUTION lights will not illuminate when knobs are not in AUTO unless aft cockpit has SPIKE DOOR transfer light illuminated on control transfer panel.</p>
</li>
<li>
<p>L and R restart switches, - Cycle to RESTART ON, then off, individually.</p>
<p>Check that the MANUAL INLET and CAUTION lights are on and the SPIKE DOOR transfer light on the control transfer panel is on when in RESTART ON.</p>
</li>
<li>
<p>Projector - Checked.</p>
<ol class="list-alpha">
<li>
<p>Verify proper loading.</p>
</li>
<li>
<p>Check controls and lights.</p>
</li>
<li>
<p>Illumination as desired.</p>
</li>
</ol>
</li>
<li>
<p>Surface limiter release handle - Pulled, and SURFACE LIMITER caution light off.</p>
</li>
<li>
<p>APW switch - CONT FWD.</p>
</li>
<li>
<p>Defog switch - CLOSED.</p>
</li>
<li>
<p>Trim power switch - ON.</p>
</li>
<li>
<p>Drag chute emergency deploy switch - Stowed and safetied.</p>
</li>
<li>
<p>A, B, and M CMPTR RESET switches - Normal (Guard down).</p>
</li>
<li>
<p>Standby attitude indicator - Erecting.</p>
<p>If required, pull the cage knob to erect the instrument, then release the knob. The instrument will erect and then seek 7° nose down and 0° roll (if the aircraft is level).</p>
<div class="note">
<p>A jitter of ±1/2° in the pitch axis is acceptable and may occur at any pitch angle.</p>
</div>
</li>
<li>
<p>Air refuel switch - OFF.</p>
</li>
<li>
<p>Altimeter - Set.</p>
<div class="note">
<p>It is possible to rotate the barometric set knob through full travel so that the 10,000-foot pointer is 10,000 feet in error. Check that the 10,000-foot pointer is reading correctly.</p>
</div>
</li>
<li>
<p>Vertical velocity indicator - Checked.</p>
<p>Check for zero indication.</p>
</li>
<li>
<p>Engine instruments - Checked.</p>
</li>
<li>
<p>Forward transfer switch - OFF.</p>
</li>
<li>
<p>Fuel dump switch - OFF (guard down).</p>
</li>
<li>
<p>Emergency fuel shutoff switches - Fuel on (guards safety wired down).</p>
</li>
</ol>
<h4>Right Console - Instructor Pilot</h4>
<ol class="list-number">
<li>
<p>SAS - OFF.</p>
</li>
<li>
<p>SAS lights - Test.</p>
<p>All SAS panel warning lights should illuminate when the test switch is depressed including the DAFICS BIT TEST and FAIL lights.</p>
</li>
<li>
<p>Autopilot - OFF.</p>
<p>Press the right console A/P OFF switch and check that the A/P OFF light is on.</p>
</li>
<li>
<p>TACAN mode selector - T/R.</p>
</li>
<li>
<p>Temperature indicator selector switch - R BAY.</p>
</li>
<li>
<p>Cockpit pressure selector switch - Set.</p>
<p>Select either the 10,000 or 26,000 foot setting. The 26,000 foot setting is normally desired.</p>
</li>
<li>
<p>Face heat rheostat - Set.</p>
<p>Use face heat at all times. Adjust for comfort.</p>
<div class="caution">
<ul class="list-circle">
<li>
<p>Do not use the HIGH face heat position when equipped with the PPG (glass) visor except for emergency heating. Continuous use of the HIGH position may delaminate the visor.</p>
</li>
<li>
<p>The face heat switch should not be set above 5 with the visor raised, or the faceplate may be damaged.</p>
</li>
</ul>
</div>
</li>
<li>
<p>ANS - Checked, MAG set.</p>
<ol class="list-alpha">
<li>
<p>DATA Switch - TEST</p>
<p>Press DISPLAY push-button switch to display data.</p>
</li>
<li>
<p>Check mission tape number and Star Catalog number.</p>
</li>
<li>
<p>DATA Switch - As required.</p>
<p>Check Control and Display Panel readouts. Check mission modifications as required.</p>
</li>
<li>
<p>MAG/GRID push-button switch - MAG.</p>
</li>
</ol>
</li>
<li>
<p>ANS DATA Switch - NORMAL</p>
<p>Press DISPLAY push-button switch to display selected data.</p>
</li>
<li>
<p>IFF - Set.</p>
</li>
<li>
<p>ILS power switch - ON.</p>
</li>
<li>
<p>MRS power switch - ON.</p>
<p>Check green ON illuminated, red FAIL not illuminated.</p>
</li>
<li>
<p>Canopy seal - OFF.</p>
</li>
</ol>
</section>
<section>
<h3>Aft Cockpit Interior Check - SR-71A</h3>
<h4>Left Console - Aft Cockpit</h4>
<ol class="list-number">
<li>
<p>Cockpit air handle - Off (forward).</p>
</li>
<li>
<p>Light rheostat switches - Set.</p>
</li>
<li>
<p>HF radio - OFF and set.</p>
</li>
<li>
<p>UHF radio - On and set.</p>
<ol class="list-alpha">
<li>
<p>Mode - INT.</p>
</li>
<li>
<p>Vol - Nearly full clockwise.</p>
</li>
<li>
<p>PWR - Set.</p>
</li>
<li>
<p>Frequency - Set.</p>
</li>
<li>
<p>Function select - Set.</p>
</li>
<li>
<p>UHF TRANS switch - Set.</p>
</li>
</ol>
</li>
<li>
<p>Interphone control panel - Set.</p>
</li>
<li>
<p>INS - Check aligning.</p>
<ol class="list-alpha">
<li>
<p>Check present position.</p>
</li>
<li>
<p>Function switch - NORM or STOR HDG.</p>
<div class="note">
<p>INS must be in NAV to obtain a valid mag heading on BDHI and HSI.</p>
</div>
</li>
<li>
<p>Check/enter desired DP's.</p>
</li>
<li>
<p>Adjust INS segment lights as desired.</p>
</li>
</ol>
</li>
<li>
<p>DEF systems - Off.</p>
<p>
<u>System A</u>: System A power ON legend not illuminated.</p>
<p>
<u>System H</u>: Warmup and standby lights extinguished and the mode switch MAN and AUTO legends off.</p>
<div class="warning">
<p>Assure that the System H Mode Indicator lights for the H LO and H HI bands are extinguished. System H transmitter radiation while on the ground is hazardous to personnel if antenna hoods are not installed.</p>
</div>
<p>
<u>System M</u>: System M power ON legend not illuminated.</p>
</li>
<li>
<p>UHF modulator/demodulator (Modem) control - Set.</p>
<ol class="list-alpha">
<li>
<p>a. Code selector switches - Set.</p>
</li>
<li>
<p>b. Range address switch - Set.</p>
</li>
</ol>
</li>
<li>
<p>Oxygen control panel - Set.</p>
</li>
<li>
<p>DEF gating generator switch - Guard down.</p>
<p>This switch is nonfunctional.</p>
</li>
</ol>
<h4>Instrument Panel - Aft Cockpit</h4>
<ol class="list-number">
<li>
<p>TACAN CONT transfer switch light - Off</p>
</li>
<li>
<p>TACAN mode selector - T/R.</p>
</li>
<li>
<p>IFF - Set.</p>
</li>
<li>
<p>G-Band Beacon switch - OFF.</p>
</li>
<li>
<p>RCD display brightness control - Full clockwise.</p>
</li>
<li>
<p>Egress lights - Press to test.</p>
<p>Press to test the ALERT, PILOT EJECTED and BAILOUT lights.</p>
</li>
<li>
<p>Cockpit pressure selector switch - Set.</p>
<p>Select either the 10,000 or 26,000-foot position. The 26,000-foot position is normally set.</p>
</li>
<li>
<p>Face heat rheostat - Set.</p>
<p>Use face heat at all times. Adjust for comfort.</p>
<div class="caution">
<ul class="list-disc">
<li>
<p>Do not use the HIGH face heat position when equipped with the PPG (glass) visor except for emergency heating. Continuous use of the HIGH position may delaminate the visor.</p>
</li>
<li>
<p>The face heat switch should not be set above 5 with the visor raised, or the faceplate may be damaged.</p>
</li>
</ul>
</div>
</li>
<li>
<p>Camera exposure control - Checked and set.</p>
<ol class="list-alpha">
<li>
<p>Rotate the exposure dial full clockwise to align the 90° index with the first high reflectivity dot.</p>
</li>
<li>
<p>Set the briefed sun angle value.</p>
</li>
</ol>
<div class="note">
<p>If the 90° index does not align with the first high reflectivity dot in the full clockwise position, the dial is not correctly installed. The corresponding electrical value on the sun dial will be incorrect.</p>
</div>
</li>
<li>
<p>Attitude indicator - Checked and set.</p>
<ol class="list-alpha">
<li>
<p>Check indicator movement and set zero pitch angle.</p>
</li>
<li>
<p>Attitude Reference Selector - ANS.</p>
</li>
</ol>
</li>
<li>
<p>V/H indicator M pointer - Set.</p>
</li>
<li>
<p>Liquid oxygen quantity indicators - Check.</p>
</li>
<li>
<p>Clock - Set.</p>
</li>
<li>
<p>BDHI No. 1 needle select switch - ADF.</p>