SDR UPS99430528

Service difficulty report · Safety Valve · Boeing 747121

Difficulty date: August 31, 1999
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N682UP
Make and model: Boeing 747121
Aircraft serial: 20349
System (JASC): 3231 · Landing Gear Door Retract Section
Part: Safety Valve
Condition: Failed
Location: Mlg Door
Stage of operation: DE
Nature of condition: J
Precautionary procedure: K

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

What was found

RIGHT BODY GEAR DOOR OPENED DURING DESCENT, 3000 FT, 220KTS. BOTH PRIMARY AND ALTERNATE SHOWED DOOR OPENED. THE DOOR DID CLOSE AFTER LANDING GEAR WAS EXTENDED. FOUND BODY RT BODY GEAR DOOR SAFETY VALVE BYPASSING TOG 36550. REMOVED AND REPLACED BODY GEAR DOOR SAFETY VALVE IAW B747 MM 32-33 -29, (NO HELP) NEEDS RIGG CHECK, PERFORMED CHECK PER MM 32-53-00, JACKED ACFT. GROUND OPS CHECK GOOD, OK FOR SERVICE.