Service difficulty report · Valve · Boeing 7474B5

Difficulty date
November 30, 2021
Submitted
December 2, 2021
Operation
Air carrier
Aircraft
N707CK
Make and model
Boeing 7474B5
Aircraft serial
26395
Aircraft time
100,811 hours, 17,829 cycles
Part
Valve
Part number
4203651
Part serial
1292A
Condition
Unserviceable
Stage of operation
DE
How discovered
O
Nature of condition
B
Precautionary procedure
K

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

What was found

EQUIPMENT COOLING. REMOVED AND REPLACED SMOKE/OVERRIDE VALVE IAW AMM 21-58-06. OPERATIONS CHECK GOOD PER AMM 45-10-00 AND AMM 21-26-00. RESET INOPERATIVE NAVIGATION DISPLAY AND FIRST OFFICER NAVIGATION DISPLAY. PERFORMED WEATHER RADAR SYSTEM SELF TEST IAW AMM 34-43-00 CONFIGURATION 4. PASSED. VARIOUS INSTRUMENT FAILURES DUE TO EQUIPMENT OVERHEAT. PERFORMED INTEGRATED DISPLAY SYSTEM ADJUSTMENT TEST IAW AMM 31-61-00. PASSED.

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