SDR AALA20150120006

Service difficulty report · Shutoff Valve · Boeing 777223

Difficulty date: January 20, 2015
Submitted: January 22, 2015
Operation: Air carrier
Aircraft: N799AN
Make and model: Boeing 777223
Aircraft serial: 30258
Aircraft time: 55,775 hours, 7,123 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Shutoff Valve
Condition: Deactivated
Location: Bleed Air Sys
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: A

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

What was found

AIR INTERRUPT, DIVERTED & EMER DECLARED. LANDING UNEVENTFUL & ACFT OVERWEIGHT. DURING CRUISE THE RT BLEED VLV INOPERATIVE LIGHT ILLUMINATED. UPON INSPECTION THE RT PRSOV WAS FOUND DEACTIVATED & THE RT HPSOV ACTIVATED WITH MEL36-3A APPLIED. DEACTIVATED THE RT HPSOV IAW MEL36-3A, REACTIVATED THE RT PRSOV. PERFORMED THE ENG AIR SUPPLY VLV OPERATIONAL TEST IAW AMM 36-10-00-700-802. SYS CHECKED NORMAL.