Service difficulty report · Fire Warning · Boeing 747422

Difficulty date
March 19, 2013
Submitted
March 23, 2013
Operation
Air carrier
Aircraft
N119UA
Make and model
Boeing 747422
Aircraft serial
28812
Aircraft time
58,868 hours, 6,785 cycles
Engine
Pwa PW4056
Part
Fire Warning
Condition
No Test
Stage of operation
IN
How discovered
C
Nature of condition
L
Precautionary procedure
K

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

What was found

FIRE TEST MASTER WARNING LIGHT GOES OUT BEFORE FIRE TEST SWITCH RELEASED. MASTER SWITCH REPLACED WITH CX PART FIRE OVERHEAD TEST SWITCH AND CMC FIRE SYSTEM GND TEST PASS AS PER AMM 26-11-00 MSG DISAPPEAR.