Service difficulty report · Unknown · Boeing 737

Difficulty date
April 30, 2022
Submitted
May 2, 2022
Operation
Air carrier
Aircraft
N435AS
Make and model
Boeing 737
Aircraft serial
43292
Aircraft time
31,751 hours, 10,097 cycles
Engine
Cfmint CFM567B27E
Part
Unknown
Part number
UNKNOWN
Condition
Unknown
Location
Unknown
Stage of operation
NR
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

1/4 KNOB SPLIT IN LOW POWER RANGE #2 ENGINE LAGS #1 WITH THROTTLE EVEN #1 40% N1 #2 36%. GROUNDED - YES. PEFORMED B737-900 FIM 22-31 TASK 801, NO FAULTS FOUND. INTERACTIVE TEST ALL PASS. EEC TEST PASS REF FIM 73-21-00. PERFORMED ENGINE POWER RUN, WITH THROTTLE LEVERS MATCHED A N1 MATCHED, #2 LEVER 1/2 TO 3/4 INCH FWD. WITH THROTTLES MATCHED #1 ENGINE INPUT MONITOR PS TRA POSITION CH A AND B IS 42.43/42.40, #2 ENGINE INPUT MONITOR TRA POSTION CH A AND B IS 40.84/40.90 ENGINE 1 IS 30% N1 AND ENGINE 2 IS AT 22.3% N1. NO DEFECTS NOTED FOR ENGINE BLEEDS ENGINE 1 FF SHOWS 1.10 ENGINE 2 0.84 ENGINE 1 N2 70.9 ENGINE 2 N2 SHOWS 61.2 SUSPECT RESOLVER FOR #2 ENGINE NEEDS ADJUSTED. REF FIM 76-05 TASK 801 AND B737-900 AMM 76-11-05. ADJUSTED #1 ENG THRUST LEVER CONTROL ROD. OPS CHECK GOOD.