SDR UIEA0031

Service difficulty report · Valve · Boeing 747271C

Difficulty date: July 13, 2000
Submitted: September 12, 2000
Operation: Air carrier
Aircraft: N537MC
Make and model: Boeing 747271C
Aircraft serial: 22403
System (JASC): 2612 · Fire Detection
Part: Valve
Condition: Failed
Location: Nr 3 Engine
Stage of operation: CL
How discovered: O
Nature of condition: M, N
Precautionary procedure: E, A

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

What was found

FLT GT723 - ATB - AT APPROXIMATELY 1500 FT, NR 3 ENGINE FIRE WARNING CAME ON. BOTH LOOPS PEGGED HIGH. FOLLOWING FHB, SHUTDOWN ENGINE AND PERFORMED FIRE CHECKLIST. LIGHTS WENT OUT AND TEMPERATURE RETURNED TO NORMAL. FIRE BOTTLES WERE NOT DISCHARGED. REPLACED PRESSURE RELIEF VALVE AND HIGH STAGE VALVE. ACCOMPLISHED INSPECTION IAW 72-00-00, PAGE 680K, 71-00-42, PAGE 110, 36-11-01, PAGE 601. ALSO, PERFORMED MPA PER 71-00-00 AND ENGINE NOW OK FOR SERVICE. (M)