Service difficulty report · Spool · Boeing 737724

Difficulty date
June 22, 2023
Submitted
June 28, 2023
Operation
Air carrier
Aircraft
N24729
Make and model
Boeing 737724
Aircraft serial
28945
Aircraft time
75,169 hours, 26,913 cycles
Part
Spool
Part number
UNKNOWN
Condition
Unknown
Location
Eng #2
Stage of operation
TO
How discovered
O
Nature of condition
O
Precautionary procedure
C

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

What was found

REJECTED TAKEOFF UNEVEN SPOOL RATES NUMBER 2 SLOW TO SPOOL PER FLT CREW ENGINES SPOOLED EVENLY TO MID 40S, ENG 1 SPOOLED UP PERFORMED EEC BITE CHECK OF #2 ENGINE AND NO FAULTS FOR RECENT TO 85% N1 WITH TOGA, ENG 2 ONLY WENT TO MID 40S% N1 FOR 2-3 SECS OR FAULT HISTORY. BEFORE CREW REJECTED. PERFORMED FIM 73-05 TASK 814 AND ACCEL TEST 8 AMM FOR FURTHER CREW EVALUATION. 71-00-00-700-824-F00. TIME TO TARGET N1 FROM STARTING N2 TARGET WAS 3.83 SECONDS (LIMIT IS LESS THAN 6.3 SECONDS). VISUAL INSPECTED HMU CONNECTIONS AND PS3 CONNECTION FOUND NO FAULTS. OK ALSO MONITORED CONTROL LOOPS FOR #2 ENGINE WHILE RUNNING AT DIFFERENT POWER SETTINGS. ALL PARAMETERS REMAINED STEADY AT DEMAND AND POSITION INDICATIONS . #2 ENGINE ACCELERATION WAS FASTER THAN #1 ENGINE.