Service difficulty report · Actuator · Boeing 737990ER

Difficulty date
June 25, 2023
Submitted
June 29, 2023
Operation
Air carrier
Aircraft
N493AS
Make and model
Boeing 737990ER
Aircraft serial
41727
Aircraft time
26,156 hours, 8,218 cycles
Part
Actuator
Part number
676000141
Part serial
676000145356
Condition
Faulty
Location
Ram Air Inlet
Part time
26,181 hours, 8,226 cycles
Stage of operation
CR
How discovered
V
Nature of condition
J
Precautionary procedure
K

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

What was found

RIGHT RAM DOOR (BLUE) LIGHT ILLUMINATED IN CRZ. GROUNDED - YES. REVERSED MEL CONFIG FOR MEL 21-5D. AFT RAM AIR LOUVERS AND INLET ACTUATOR BACK TO NORMAL CONFIG. 5 CB PULLED, COLLARED, AND RESET. SRADA LINK AND BOLT, NUT, AND COTTER PIN STOWED IN MAIN E/E FLY AWAY KIT. PERFORMED INITIAL EVALUATION IAW FIM 21-51 TASK 803, ALL INDICATIONS NORMAL. PZTC BITE IAW FIM 21-62 TASK 801, NO FAULTS. PASSES BITE. BOTH ACTUATOR LEDS GREEN. REMOVED AND REPLACED RAM AIR INLET ACTUATOR IAW AMM 21-51-21-000/400-801 AS PRECAUTIONARY. PASSES INSTALL TEST. NO RIGGING REQUIRED. RE RAN PZTC BITE AND RAM AIR OPS TEST IAW AMM 21-51-00-730-801. ALL TEST PASS. NO HISTORY LAST 30 DAYS. THIS CLEARS MEL 21-5D. A/C RETURNED TO NORMAL CONIFG.