SDR UIEA2023061600647

Service difficulty report · Shutoff Valve · Boeing 74747UF

Difficulty date: June 16, 2023
Submitted: June 20, 2023
Operation: Air carrier
Aircraft: N416MC
Make and model: Boeing 74747UF
Aircraft serial: 32838
Aircraft time: 88,714 hours, 14,580 cycles
System (JASC): 2100 · Air Conditioning System
Part: Shutoff Valve
Part number: 322684002
Part serial: 547
Condition: Unknown
Location: Unknown
Stage of operation: CR
How discovered: V
Nature of condition: F, O
Precautionary procedure: D, O

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

What was found

ITEM 1: AIR TURNBACK DUE TO COCKPIT AND UPPER DECK TEMPERATURES CONTINUALLY DROPPING. FLT DECK SET AT 29C, FWD DECK SET AT 15C, UPPER DECK 8C & CREW REST AT 3C.(<P>REMOVED AND REPLACED FWD TRIM AIR SHUTOFF VALVE PER AMM 21-28-04, TEST PASSED.</P>)

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