SDR EIA2006023

Service difficulty report · Controller · Boeing 747SR46

Difficulty date: February 10, 2006
Submitted: March 8, 2006
Operation: Air carrier
Aircraft: N477EV
Make and model: Boeing 747SR46
Aircraft serial: 20784
System (JASC): 3610 · Pneumatic Distribution System
Part: Controller
Condition: Malfunctioned
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

PRESSURE RELIEF VALVE OPENS IN FLIGHT. UNABLE TO CONTROL OVER PRESSURE CONDITION RESULTING IN AN AIR TURN BACK. PRELIMINARY REVIEW ON GROUND REVEALED NO FINDINGS SO FAR. REPLACED AUTO PRESS CONTROLLER PER MM 21-31-02, OPS CHK OK, PITOT STATIC TEST C/W PER 34-11-01. OPS CHK BLEED AIR VALVE, FOUND OK PER 36-11-12.

More about the Boeing 747-SR-46