SDR 2023F00062

Service difficulty report · A/C Pack · Boeing 7378

Difficulty date
January 27, 2023
Submitted
February 22, 2023
Operation
General aviation
Make and model
Boeing 7378
Aircraft serial
36703
Part
A/C Pack
Part number
22064002
Part serial
9331
Condition
Oscillates
Stage of operation
IN
How discovered
C
Nature of condition
Z
Precautionary procedure
K

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

What was found

DUE PRESURIZATIONOSCLLATION +/- 1000 FTS AND HIGH ALTITUD ALERT, 1. -PACK OPERATION CONFIDENCE CHECK WAS PERFORMED I.A.W.A.M.M TASK21-00-05-780-801 TEST CORRECT.- 2.- CHECK WIRING FOR CONTINUITY AND ISOLATION IAW WDM 21-51-12 ALL CORRECT.- 3.- TCV WAS REPLACE IA. W AMM 21-51-10-000-801/400-801 TEST CORRECT 4.- AIR CYCLE MACHINE TORQUE CHECK IAW AMM 21-51-0-700-804-5 LB/IN 5.- ACM WAS REPLACED IAW AMM 21-51-04-00-802-002/400-002 TEST CORRECT

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