Service difficulty report · Warning System · Boeing 737990ER

Difficulty date
October 4, 2018
Submitted
October 9, 2018
Operation
Air carrier
Aircraft
N433AS
Make and model
Boeing 737990ER
Aircraft serial
41704
Aircraft time
19,740 hours, 6,503 cycles
Part
Warning System
Condition
False Activation
Location
Cockpit
Stage of operation
DE
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

DURING DESCENT CHECKLIST WHEN MASTER CAUTION RECALL WE GOT AN AIR COND LIGHT AND A LEFT PACK LIGHT. CHECKLIST FOLLOWED AND BOTH LIGHTS EXTINGUISHED WHEN MASTER CAUTION WAS RESET. GROUNDED - YES. NR 1 CONTROL FAULTED NR 1 INLET RAM AIR ACTUATOR. ACCOMPLISHED BITE CHECK AMM 21-61-00. BITE TEST PASSED, FAULT RESET.