SDR ASAA2019011927866

Service difficulty report · Tank Unit · Boeing 737890

Difficulty date: January 19, 2019
Submitted: January 23, 2019
Operation: Air carrier
Aircraft: N508AS
Make and model: Boeing 737890
Aircraft serial: 35691
Aircraft time: 39,955 hours, 11,996 cycles
System (JASC): 2842 · Fuel Quantity Sensor
Part: Tank Unit
Part number: 202000311
Condition: Out Of Limits
Location: Fuel Tank
Stage of operation: IN
How discovered: C
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

TECH SERVICE REQUEST. FOLLOW-UP TO REPORTS OF FUEL IMBALANCE, TECH SERVICE REQUESTS L/H TANK AND COMPENSATOR UNITS TEST. GROUNDED - YES. FOUND 4 TANK UNITS OUT OF LIMITS - F2L, F3L, F6L, F8L. REMOVED AND REPLACED F3L, F6L, AND F8L PER AMM 28-41-21/401. REMOVED AND REPLACED FUEL PROBE TANK UNIT F2L IAW AMM 28-41-21/401. PERFORMED FQIS SYSTEM TEST REF AMM 28-41-00-730-801 OPS CK GOOD. LEAK CK GOOD REF AMM 28-11-00.