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SDR CA030224003

Open the Markdown

Service difficulty report · Fire Loop · Boeing 737281

FAA SDR system

Difficulty date
February 20, 2003
Submitted
March 25, 2003
Operation
Air carrier
Make and model
Boeing 737281
Aircraft time
46,304 hours
Engine
Pwa JT8D17
System (JASC)
2612 · Fire Detection
Part
Fire Loop
Condition
Malfunctioned
Location
Apu
Part time
34,247 hours
Stage of operation
CR
How discovered
O
Nature of condition
N
Precautionary procedure
F, A

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

What was found

(CAN) CREW REPORTED, AT CRUISING ALTITUDE, 20 MINUTES OUT OF YLW THEY EXPERIENCED A VIBRATION FOLLOWED BY AN APU FIRE WARNING. CREW SHUTDOWN APU WITH THE FIRE HANDLE AND APU FIRE BOTTLES WERE DISCHARGED. A/C COMPLETED AN (ABNORMAL LANDING CONFIGURATION) IN YLW WITH CFR ON STANDBY NO EMERGENCY WAS DECLARED. A/C LANDED WITHOUT INCIDENT. MAINTENANCE INVESTIGATION FOR EVIDENCE OF FIRE AND EXTERNAL INTEGRITY OF THE APU REVEALED NO SIGNS OF FIRE. THE APU AND APU FIRE SHUT OFF SYSTEM WAS PLACED ON MEL (49-1 AND 26-7-1). MAINTENANCE HAS SINCE REPLACED APU FIRE LOOP WARNING HARNESS AND PLAN TO REPLACE EGT WIRING PRIOR TO MEL EXPIRING 02 MAR.03. AIRCRAFT HAS RETURNED TO SERVICE WITH NO FURTHER INCIDENTS TO REPORT.