SDR ASAA2023052543362

Service difficulty report · Sense Line · Boeing 737900ER

Difficulty date: May 25, 2023
Submitted: May 26, 2023
Operation: Air carrier
Aircraft: N408AS
Make and model: Boeing 737900ER
Aircraft serial: 41732
Aircraft time: 38,413 hours, 12,145 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: Sense Line
Part number: 332A235011
Condition: Broken
Location: #1 Engine
Stage of operation: TX
How discovered: V
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

AFTER ENGINE START LEFT BLEED AIR DUCT PRESSURE INDICATES 8 PSI, RIGHT BLEED AIR DUCT INDICATES 19 PSI WITH ENGINE POWER AT IDLE, A/C PACKS IN AUTO, AND ENGINE ANTI ICE OFF. GROUNDED - YES. FOUND CONTROL PRESSURE SENSE LINE FROM THE HIGH STAGE REGULATOR BROKEN. REPLACED SENSE LINE IAW B737-900 AMM 36-11-06-400-801 STEP F (8) (A)-(D).

More about the Boeing 737-900ER