Service difficulty report · Warning Message · Boeing 767306

Difficulty date
August 22, 2019
Submitted
August 23, 2019
Operation
Air carrier
Aircraft
N1399A
Make and model
Boeing 767306
Aircraft serial
27959
Aircraft time
89,343 hours, 16,993 cycles
Part
Warning Message
Condition
False Activation
Location
Lt Eng Bleed
Stage of operation
CR
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

LEFT ENG BLEED OFF EICAS MESSAGE INTERMITTENTLY DURING FLIGHT WITH LOW POWER SETTINGS. THE LEFT DUCT PRESSURE WAS HALF THE PRESSURE OF THE RIGHT. PERFORMED B767 FIM 21-51-FT 803, OPS CHECKS GOOD. ACFT RETURNED TO NORMAL CONFIGURATION.