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SDR ASAA2016060316932

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Service difficulty report · Control Valve · Boeing 737990ER

FAA SDR system

Difficulty date
June 3, 2016
Submitted
June 6, 2016
Operation
Air carrier
Aircraft
N419AS
Make and model
Boeing 737990ER
Aircraft serial
41734
Aircraft time
12,829 hours, 4,173 cycles
System (JASC)
2160 · Cabin Temperature Control System
Part
Control Valve
Part number
3989083
Part serial
19090
Condition
Failed
Location
Temperature
Part time
12,824 hours, 4,171 cycles
Stage of operation
DE
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

RIGHT "PACK" LIGHT ILLUMINATED DURING MASTER RECALL ON DESCENT, CHECK LIGHT EXTINGUISHES WHEN MASTER CAUTION RESET. ACFT GROUNDED. CONFIRMED FAULT, RT PACK/ZONE TEMPERATURE CONTROLLER BITE, REF AMM TASK 21-61-00-700-806-002 SHOWS HARD FAILURE, TCV NR 2, V141, WOULD NOT RESET. GVI TCV NR 2 SHOWS OIL LEAKING. R & R TCV NR 2, REF AMM TASK 21-51-10, GROUND FUNCTIONAL CHECK AND LEAK CHECK NORMAL.