Emergency Exit Hatch 506
52-21-0 Figure 1 (Sheet 1) May 15/69
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500 Emergency Exit Hatch
Apr 15/66 Figure 1 (Sheet 2) 52-21-0
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C. The trim panel attached to the inside surface of the hatch is provided with a recess-type handhold in the lower part of the panel to assist in removing the hatch from the hatch opening. A roller-type window shade is also incorporated in the trim panel. The emergency exit hatches are not included in the door open warning system.
D. The hatch is opened from inside the airplane by pulling down on the handhold pocket which is attached to the operating handle . (See figure 2.) The action of the handle rotates the torque tube against the torsion spring load, and causes the bell cranks to turn. The latch rollers disengage from the latch fittings and allow the hatch to move inward at the top edge. Continuing to hold the upper handle, the lower handle is grasped with the free hand and the hatch is pulled inward at the top edge, disengaging the lower pivot fitting from the lower pivot hook. With both hands, the hatch is lifted upwards and inwards away from the opening.
E. The hatch is opened from outside the airplane by pushing in the flush panel at the top of hatch and then pushing the hatch inwards. (See figure 2.) An assistant should be inside the airplane to receive the hatch to avoid damage.
506
52-21-0 Page 4 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Aug 15/68
506 Emergency Exit Hatch Operation
May 15/69 Figure 2 52-21-0
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BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
EMERGENCY EXIT HATCH - REMOVAL/INSTALLATION
1. General
A. On airplanes with Carry-all Compartment Interior, self-illuminating signs are used for emergency exit hatches. The signs use gas-filled capsules of radioactive tritium to cause the phosphorescent material in the signs to glow. No radiological health hazard is present when signs are intact. However, if a sign is cracked or broken, a potential health hazard exists.
WARNING: IF SIGN IS CRACKED OR BROKEN, LEAVE AREA IMMEDIATELY. KEEP AIR DISTRIBUTION SYSTEM OPERATING. AFTER APPROXIMATELY 20 MINUTES REPLACE SIGN PER CHAPTER 33, SELF-ILLUMINATING SIGNS -MAINTENANCE PRACTICES.
B. If an emergency exit hatch is removed and reinstalled at the same location to the same airplane, without disturbance to its adjustments, it may be installed in accordance with par. 3.
C. If the emergency exit hatch to be installed is a new unit or one that is being installed at a different location, it must first be prepared as described in Emergency Exit Hatch -Adjustment/Test.
2. Remove Emergency Exit Hatch
A. From inside airplane, unlatch emergency exit hatch by pulling down on upper handhold (Fig. 401).
B. Grasp lower handhold with free hand, and pull hatch inward at top edge by means of upper handle until lower pivot fitting can be disengaged from lower pivot hook.
C. Lift hatch up and inboard with both hands, and remove from opening.
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Aug 15/78 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 52-21-0 Page 401
Emergency Exit Hatch Removal 506
52-21-0 Figure 401 Aug 15/68
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506 Emergency Exit Hatch Installation
Aug 15/68 Figure 402 52-21-0
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3. Install Emergency Exit Hatch
A. From inside airplane, support hatch in hatch opening and engage lower pivot fitting (2, Section B-B, Fig. 402) with lower pivot hook (4) on sill (3) of hatch opening.
CAUTION: TO AVOID SEAL DAMAGE, HATCH WILL HAVE TO BE IN AS NEAR VERTICAL POSITION AS POSSIBLE WHILE LOWER PIVOT FITTING ENGAGES LOWER PIVOT HOOK. LOWER EDGE OF HATCH MUST ALIGN WITH SILL EDGE BEFORE LATCHING.
B. Pull down on upper handhold and push upper edge of hatch outboard so that latch rollers engage latches.
C. Push upper handhold upward to engage latch rollers with latches.
D. Check hatch seal (l) correct seating around hatch opening.
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