SDR DALA2019091905424

Service difficulty report · Regulator · Boeing 757232

Difficulty date: September 18, 2019
Submitted: September 19, 2019
Operation: Air carrier
Aircraft: N688DL
Make and model: Boeing 757232
Aircraft serial: 27587
Aircraft time: 67,778 hours, 28,704 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Regulator
Condition: Malfunctioned
Location: Bleed Air Sys
Stage of operation: TO
How discovered: O
Nature of condition: O
Precautionary procedure: K

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

What was found

SHIP 0688 -DIV- AFTER TAKEOFF RIGHT ENGINE BLEED TRIPPED OFF. SHORTLY AFTER LEFT ENGINE BLEED TRIPPED CAUSING RAPID DESCENT AND MASKS DID NOT DEPLOY. CORRECTIVE ACTION: REPLACED FAN AIR TEMP SENSOR PER AMM 36-11-17. REPLACED REVERSE FLOW CONTROLLER PER AMM 36-11-18. NO HELP. TROUBLESHOT PER FIM 36-10 TASK 815-805. FOUND SENSE LINE DAMAGED. REPLACED SENSE LINE AND ELBOW PER IPC 36-11-18-01. NO HELP. REPLACED PRSOV REGULATOR PER AMM 36-11, RELAYS K10206 AND K10454. OPS AND LEAK CHECK GOOD.