Service difficulty report · A/C Pack · Boeing 737890

Difficulty date
November 30, 2022
Submitted
December 12, 2022
Operation
Air carrier
Aircraft
N506AS
Make and model
Boeing 737890
Aircraft serial
35690
Aircraft time
51,874 hours, 15,682 cycles
Part
A/C Pack
Condition
Faulted
Location
Left
Stage of operation
CL
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

DURING CLIMB LT A/C PACK LIGHT ILLUMINATED. RAN THE QH PACK CHECKLIST PAT LT EXTINGUISHED AFTER TRIP RESET WITHIN A COUPLE MINUTES PACK LT ILLUMINATED AGAIN . RAN PACK QRH CHECKLIST AGAIN. TRIP RESET EXTINGUISHED THE LT. CHECKED LEFT PACK TEMP. STARTED RISING AGAIN RIGHT AWAY UNTIL PACK LT CAME ON A THIRD TIME. SHUT DOWN LEFT A/C PACK IAW QRH PRESSURIZATION NORMAL. GROUNDED - YES. FLAP SWITCH CHECKS GOOD, CONNECTOR D46040 PIN M TO GND DURING SEVERAL FLAPS UP AND NOT UP CYCLES IAW WDM 21-51-14. LH DEFLECTOR DOOR FAILS TO STOW AT STEP (9)A AMM 21-51-00-730-802 RADA OP TEST. DEFECTOR DOOR SLOWLY MOVES TOWARD STOWED THEN STOPS HALF WAY. RAM AIR SYSTEM OPS TESTED GOOD IAW AMM 21-51-00-730-802. BITE CHECKED TEMP CONTROL GOOD. RAN PACK, NO FAULTS NOTED. ORIGINAL SUBMISSION DATE: 12/5/2022