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SDR ASAA1159191

Open the Markdown

Service difficulty report · Sense Line · Boeing 737890

FAA SDR system

Difficulty date
March 7, 2011
Submitted
March 10, 2011
Operation
Air carrier
Aircraft
N560AS
Make and model
Boeing 737890
Aircraft serial
35179
Aircraft time
17,276 hours, 5,389 cycles
System (JASC)
3620 · Pneumatic Indicating System
Part
Sense Line
Part number
1613580
Condition
Leaking
Location
Bleed Air Sys
Stage of operation
IN
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

NR 1 ENGINE PRECOOLER CONTROL VALVE FAILED INSTALLATION TEST PER AMM 36 12 02 400 801 STEP G. DETERMINED PRECOOLER CONTROL VALVE IS EFFECTIVE FOR AIRCRAFT. REMOVED AND REPLACED NR 1 ENG PRECOOLER CONTROL VALVE IAW ASA AMM 36 12 02 000 801 AND AMM 36 12 02 400 801 PERFORMED A GOOD INSTALLATION TEST IAW ASA AMM 36 12 02 400 801. UPON FURTHER INVESTIGATIONS FOUND PRECOOLER CONTROL VALVE SENSE LINE P/N 16135 80 GOING TO THE PRECOOLER CONTROL VALVE SENSOR LEAKING AIR THRU THE WIRE BRAIDS. REMOVED AND REPLACED THE PRECOOLER CONTROL VALVE SENSE LINE P/N 16135 80 PER M/M 20 10 52 000 801 AN DM/M 20 10 52 400 801.