SDR UIEA2020021080212

Service difficulty report · Valve · Boeing 767306

Difficulty date: February 8, 2020
Submitted: February 10, 2020
Operation: Air carrier
Aircraft: N1427A
Make and model: Boeing 767306
Aircraft serial: 28098
Aircraft time: 80,685 hours, 17,396 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Valve
Part number: 7738556
Part serial: 870214
Condition: Failed
Location: Fan Air
Stage of operation: CL
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

L DUCT PRESSURE FLUCTUATES TO 0 DURING CLIMB, ACCOMPANIED WITH "L ENG BLEED OFF" (INTERMITTENT). NOTE: DURING CRUISE, RIGHT DUCT PRESSURE AT 35 AND LEFT AT 17.(<P>RAN FIM 36-10 FAULT TREE 837, REMOVED AND REPLACED FAN AIR VALVE PER AMM 36-11-16. RAN ENGINE, OPS CHECKS GOOD.</P>)