Brief Description: INSTALLING THE DOOR LATCH ANCHORS
STEPS:
1. PERFORM THESE PROCEDURES WITH THE DOOR AND THE GAS STRUT INSTALLED ON THE AIRCRAFT.
2. WITH THE DOOR LOCKING MECHANISM IN THE OPEN POSITION, CLOSE THE MAIN DOOR FROM INSIDE THE COCKPIT.
3. CLOSE THE DOOR LATCHES UNTIL THEY CONTACT THE FUSELAGE FLANGE.
4. MAKE A SQUARE OR RECTANGULAR NOTCH IN THE FUSELAGE WHERE EACH OF THE DOOR LATCHES MAKE CONTACT. KEEP THE SIZE OF THE NOTCH THE MINIMUM REQUIRED. IT IS RECOMMENDED TO ROUND THE INTERIOR CORNERS OF THE NOTCHES TO PREVENT CRACKING.
5. INSTALL THE THREE LOWER LATCH ANCHORS.
note: installing the lower latch anchors first ensures proper latching when all eight latch anchors have been installed.
a) SET THE ADJUSTMENT PLATE (212-0098) SET SCREW HALFWAY IN TO PROVIDE MAXIMUM ADJUSTABILITY.
b) TEMPORARILY PLACE A SHIM ON BOTH SIDES OF THE LATCH ARM TO HOLD IT CENTERED IN THE LATCH BODY.
c) ALIGN THE LATCH ANCHOR ASSEMBLY WITH THE LATCH ON THE DOOR.
d) ADJUST THE HEIGHT OF THE LATCH ANCHOR USING A G-10 PAD (212-0099 or 212-0100) AND SHIMES (118-0009, 118-0010, 118-0011). THE HEIGHT OF THE LATCH IS CORRECT WHEN THE BALL ON THE LATCH ARM IS FULLY SEATED IN THE ANCHOR WHEN THE LATCH MECHANISM IS OVER-CENTERED.
note: When determining the height of the latch anchors, take into account that these G-10 pads will be overlain with two layers of 2-BID layup before final installation.
e) MATCH DRILL THE LATCH ANCHOR TO THE G-10 PAD
f) CHOOSE SCREWS OF SUITABLE LENGTH.
g) SQUARE OFF THE SCREW HEADS. REFER TO CHAPTER 2 INTRODUCTION TO MATRIALS AND PROCESSES FIGURE 2.3.A.5 SECURING SCREWS. AND SET THEM INTO THE -10 PAD, AS SHOWN BELOW.
h) ENSURE THE LATCH ANCHORS ARE PROPERLY POSITIONED AND ALIGNED AND BOND THE G-10 PADS TO THE FUSELAGE USING FLOX OR HYSOL. REFER TO FIGUREE 15.2.D.4 TYPICAL G10 PAD HARDPOINT INSTALLATION.
i) REMOVE THE ANCHORS AND THE SHIMS (IF ANY) AND ALLOW THE BONDED PADS TO CURE.
j) CREATE MICRO FILETS AROUND THE PADS.
k) SURFACE PREP THE PADS AND THE SURROUNDING AREA AND APPLY A 4-BID LAYUP STA
