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SDR UIEA200300061

Open the Markdown

Service difficulty report · Fire Loop · Boeing 747230B

FAA SDR system

Difficulty date
November 7, 2003
Submitted
November 19, 2003
Operation
Air carrier
Aircraft
N509MC
Make and model
Boeing 747230B
Aircraft serial
21221
Engine
Ge CF650E2
System (JASC)
2612 · Fire Detection
Part
Fire Loop
Condition
Malfunctioned
Location
Nr 2 Engine
Stage of operation
DE
How discovered
O
Nature of condition
N
Precautionary procedure
F, E

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

What was found

DURING DESCENT INTO ANC, NR 2 ENGINE HAD A FIRE WARNING PASSING THROUGH 16000 FT AT IDLE POWER. NR ENGINE (A) LOOP IS PLACARDED INOPERATIVE. PERFORMED EMERGENCY FIRE CHECK LIST AND SHUTDOWN ENGINE. FIRE HANDLE WAS PULLED AT 1946Z, TT EDP IN DEPRESSURIZE MODE WAS 19 MIN. DUCT PRESSURE DROPPED TO 10 PSI AND NO ADP RUN LIGHT. EVENTUALLY DUCT PRESSURE CAME BACK TO NORMAL. NACELLE TEMPERATURE WAS NORMAL. FOUND PYLON DETECTOR FORWARD SECTION LOOSE, RETORQUED FASTENERS IAW MM 70-51-01, GROUND OPS CHECK 2A, B LOOPS OK IAW MM 26-11-00.(K)