SDR UPS97422375

Service difficulty report · Lockpin · Boeing 747121

Difficulty date: March 13, 1997
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N691UP
Make and model: Boeing 747121
Aircraft serial: 19641
System (JASC): 5220 · Emergency Exits
Part: Lockpin
Condition: Misaligned
Location: Crew Hatch
Stage of operation: CL
Nature of condition: O
Precautionary procedure: A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

INSPECTION TYPE-N/A, AIR TURNBACK AT 21,000 FEET, LOUD POP AND HISS, AIR NOISE. CABIN CLIMBING AT 400 FPM MAX CABIN ALTITUDE REACHED 7,000 FEET. CREW HATCH UNSEATED BUT REMAINED IN POSITION, REF MM 52-21-00. FOUND OVERHEAD LATCH AFT LOCKPIN MISALIGNED AND DOOR JAMMED. OPENED DOOR, CHECKED PINS AND FRAME FOR DAMAGE, NONE NOTED. CYCLED CLOSED SEVERAL TIMES, CHECKS GOOD.