Service difficulty report · Sending Unit · Boeing 737890

Difficulty date
January 29, 2016
Submitted
January 29, 2016
Operation
Air carrier
Aircraft
N593AS
Make and model
Boeing 737890
Aircraft serial
35107
Aircraft time
30,246 hours, 9,304 cycles
Part
Sending Unit
Part number
202000208
Condition
Failed
Location
Fuel Tank
Stage of operation
IN
How discovered
9
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

REF TSR 817439, FOUND NR 2 FUEL QTY TANK UNIT CAPACITANCE OUT OF TOLERANCE. ACFT GROUNDED. ACCOMPLISHED SYS TEST OF NR 2 FUEL QTY INDICATING SYS IAW AMM 28-41-00-730-801. FOUND NR 2 TANK TOTAL CAPACITANCE AT 414 PICOFARADS AND OUT OF LIMITS. ACCOMPLISHED TANK AND COMPENSATOR UNITS TEST IAW AMM 28-41-21-710-801, REF TABLE 504, FOUND TANK UNIT 9 READING OUT OF LIMITS AT 43.06 PICOFARADS WITH A RANGE OF 32.55-34.05. FOUND TANK UNIT 10 READING OUT OF LIMITS AT 49.71 WITH A RANGE OF 27.11-28.61. R & R TANK UNITS 9 AND 10 IAW AMM 28-41-21. RECHECKED TANK TOTAL CAPACITANCE AND FOUND TO BE WITHIN LIMITS AT 398.1. ACCOMPLISHED FQIS COMPARISON CHECK IAW AMM 28-41-00-720-801. NO DIFFERENCE FROM STICK AND INDICATED QTY. LEAK CHECK OK, REF AMM 28-11-00-400-801.