Service difficulty report · Hmu · Boeing 737890

Difficulty date
October 6, 2014
Submitted
October 7, 2014
Operation
Air carrier
Aircraft
N570AS
Make and model
Boeing 737890
Aircraft serial
35185
Aircraft time
29,022 hours, 8,673 cycles
Engine
Cfmint CFM567B27
Part
Hmu
Part number
442597
Part serial
BECW7645
Condition
Warning Light
Location
Nr 1 Engine
Part time
15,251 hours, 4,716 cycles
Stage of operation
IN
How discovered
9
Nature of condition
J
Precautionary procedure
K

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

What was found

NR 1 ENGINE VALVE CLOSED LIGHT IS ILLUMINATED, CLOSED. ACFT GROUNDED. REPLACED THE HMU IAW T/C'S N8473000 & N8473001. OPS & LK CK'S GOOD. OK FOR CONTINUED SERVICE.