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SDR UALA2009062201759

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Service difficulty report · Fire Loop · Boeing 777222

FAA SDR system

Difficulty date
June 22, 2009
Submitted
June 22, 2009
Operation
Air carrier
Aircraft
N211UA
Make and model
Boeing 777222
Aircraft serial
30217
Aircraft time
32,418 hours, 7,263 cycles
Engine
Pwa PW4077
System (JASC)
2612 · Fire Detection
Part
Fire Loop
Condition
Shorted
Location
Apu
Stage of operation
IN
How discovered
O
Nature of condition
O
Precautionary procedure
K

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

What was found

FIRE LOOP 1 APU AUXILIARY POWER UNIT (APU) FIRE DETECTION SYSTEM LOOP 1 FAILURE. STATUS MSG01- NOT ACTIVE CRUISE INTERMITTENT; APU FIRE DETECTION CARD HAS AN INTERNAL FAULT. DB- APU FIRE DETECTION CARD MSG02- ACTIVE CRUISE HARD; APU FIRE DETECTION CARD HAS AN INTERNAL FAULT. MSG03- ACTIVE CRUISE INTERMITTENT; APU FIRE LOOP 1 IS SHORTED. DB- APU FIRE DETECTION CARD MSG-2610010 INACTV ER INTER MSG-2610010 ACTIVE ER HARD MSG-2610100 ACTIVE ER INTER. FIRE BOTTLE FIRED, CHECKED MEL ITEMS, ALL OK. APU IS INOP.