Service difficulty report · Warning Light · Boeing 737990ER

Difficulty date
July 27, 2017
Submitted
July 31, 2017
Operation
Air carrier
Aircraft
N457AS
Make and model
Boeing 737990ER
Aircraft serial
36355
Aircraft time
13,931 hours, 4,613 cycles
Part
Warning Light
Condition
False Activation
Location
A/C Pack
Stage of operation
NR
How discovered
O
Nature of condition
N
Precautionary procedure
O

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

What was found

RIGHT PACK ILLUMINATED DURING RECALL AND RESET WHEN MASTER CAUTION WAS PUSHED. ACFT GROUNDED. UNABLE TO DUPLICATE DEFECT. MASTER CAUTION RECALL SHOWED NO PACK LIGHTS AND BITE OF BOTH PACK/ZONE TEMP CONTROLLERS IAW FIM 21-62 TASK 801 SHOWED NO FAULTS LOGGED, AND VERIFIED TEST PASSED FOR BOTH. DUE TO HISTORY, PERFORMED RAM AIR SYSTEM OPERATIONAL TEST IAW AMM 21-51-00-730-801 AND PACK FLOW CONTROL VALVE OPS TESTED IAW AMM 21-51-00-700-802. ALL TESTS PASSED.