SDR ASAA1159654

Service difficulty report · Unknown · Boeing 737890

Difficulty date: May 16, 2011
Submitted: May 18, 2011
Operation: Air carrier
Aircraft: N517AS
Make and model: Boeing 737890
Aircraft serial: 35197
Aircraft time: 8,901 hours, 2,735 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Unknown
Condition: Malfunctioned
Location: Bleed Air Sys
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: K

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

What was found

AT FL 390 DUAL BLEED TRIP WHEN POWER LEVERS TO IDLE FOR DESCENT. BLEEDS RESTORED ACCOMPLISHED QRH BLEED TRIP PROCEDURE. PERF PRECOOLER AND BLEED HEALTH CHECK PER AMM 36 12 00 ON BOTH NR 1 AND NR 2 ENGINES. NO DEFECTS NOTED. ACCOMP CROSSOVER BLEED TEST OF BOTH ENGINES REF AMM 36 11 00 710 801. BOTH ENGINES OPS CHECK GOOD, NO ABNORMAL INDICATIONS. GROUND VERIFICATION CHECKS PASS REF 36 12 00 AND 36 11 00 FOR BOTH ENGINES.