Service difficulty report · Accessory Unit · Boeing 737890

Difficulty date
September 22, 2014
Submitted
September 24, 2014
Operation
Air carrier
Aircraft
N533AS
Make and model
Boeing 737890
Aircraft serial
35201
Aircraft time
14,692 hours, 4,424 cycles
Part
Accessory Unit
Part number
655281064
Part serial
6552810F09392
Condition
Warning Light
Location
Rt A/C Pack
Part time
14,707 hours, 4,431 cycles
Stage of operation
NR
How discovered
9
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

RIGHT PACK LIGHT ILLUMINATED AFTER RECALL. RESET CANCELLED LIGHT. ACFT GROUNDED. BITE CHECK OF RIGHT PACK ZONE TEMP CONTROLLER, M1443, BIT AND PREV FLT FAULT RAM AIR ACTURATOR. REPLACED ACAU NR 2, M1455. INSTALLATION AND OPS TEST OF M1445 RT RAM AIR SYSTEM RELAYS OK REF AMM 21-51-02/401&501. OPERATED PACKS, OPS NORMAL. BITE CHECK OF RT PACK/ZONE TEMP CONTROLLER VERIFY HAS GREEN GO LIGHT.