Service difficulty report · Hmu · Boeing 7377H4

Difficulty date
June 18, 2020
Submitted
August 20, 2020
Operation
Air carrier
Aircraft
N757LV
Make and model
Boeing 7377H4
Aircraft serial
29850
Aircraft time
71,610 hours, 41,944 cycles
Engine
Cfmint CFM567B242
Part
Hmu
Part number
06848442653
Part serial
BECN1842
Condition
Slow
Location
Nr 1 Engine
Stage of operation
DE
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

WAIVE DESCENDING FOR TURBULENCE 400-380 NO PROBLEMS NOTED AFTER DESCENT AND LEVELING @ 380 ENGINE WAS SLOW TO POWER UP (AUTO THROTTLES ON) DESCENDED TO 360 AND #1 ENGINE WAS HOVERING @ 55% AND SLOWLY ROLLING BACK/DECENDED @ IDLE ENG FAIL LIGHT CAME ON /DECENDED TO 20K ENGINE SPOOLED BACK UP IN DESCENT. PERFORMED FIM TASK 73-05 TASK 805 'ENG FAIL MESSAGE' ALL STEPS SATISFACTORY. CHANGED HMU PER STEP E12. R+R'D #1 ENG HMU PER M/M 73-21-10. ALL OPS AND LEAK CHECKS GOOD.

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