Service difficulty report · Actuator · Boeing 737990ER

Difficulty date
January 6, 2019
Submitted
January 8, 2019
Operation
Air carrier
Aircraft
N408AS
Make and model
Boeing 737990ER
Aircraft serial
41732
Aircraft time
24,155 hours, 7,887 cycles
Part
Actuator
Part number
5416744
Part serial
15585
Condition
Failed
Location
Ram Air
Part time
22,846 hours, 8,518 cycles
Stage of operation
TX
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

ON TAXI OUT LEFT PACK LIGHT ILLUMINATES ON RECALL. LEFT PACK LIGHT EXTINGUISHES WITH MASTER CAUTION PUSH TO RESET. GROUNDED - YES. PERFORMED FIM 21-62 TASK 801, BITE TEST SHOWN 'RAM AIR ACT' FAULTED ON CURRENT AND PREVIOUS FLIGHT, DUE TO HISTORY, REMOVED & REPLACED RAM AIR ACT REF AMM 21-51-21. CW BOND CK PER SWPM 20-20-00 CHK'D GOOD. PERFORMED BITE TEST OF PACK/ZONE TEMP CONTROLLER AMM TASK 21-61-00-700-806-002. OPS GOOD. NO DEFECTS NOTED.