Service difficulty report · Actuator · Boeing 737990ER

Difficulty date
November 17, 2019
Submitted
November 19, 2019
Operation
Air carrier
Aircraft
N407AS
Make and model
Boeing 737990ER
Aircraft serial
41731
Aircraft time
27,923 hours, 8,889 cycles
Part
Actuator
Condition
Failed
Location
Rt Ram Air
Stage of operation
NR
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 RECALL MASTER CAUTION AIR COND AND RIGHT PACK LIGHT ILLUMINATE. ALL LIGHTS EXTINGUISH WITH RESET. GROUNDED - YES. PERFORMED PACK TEMPERATURE CONTROL BITE PER B737-900 FIM 21-62 TASK 801. BIT FAILED RIGHT RAM AIR DOOR ACTUATOR, PREVIOUS FLIGHT FAILED RIGHT RAM AIR DOOR ACTUATOR. VERIFY PORTION OF THE TEST PASSED AND CLEARED RIGHT RAM AIR DOOR ACTUATOR LIGHT. PERFORMED 2 ADDITIONAL CONTROL BITE TESTS, FAULT DID NOT REOCCUR.