What was found
FIRE WARNING IN NR 1 ENGINE. NR 3 BEARING BREATHER TUBE AT 1 O'CLOCK WAS FOUND TO BE CRACKED FORWARD OF SEAL RING GROOVES. THIS CRACKED TUBE ALLOWED 15TH STAGE HOT AIR TO ENTER THE 7TH STAGE BUFFER AIR COMPARTMENT.
- Difficulty date
- February 27, 1996
- Submitted
- March 26, 2000
- Operation
- Air carrier
- Aircraft
- N4719U
- Make and model
- Boeing 747122
- Aircraft serial
- 19880
- Engine
- Pwa JT9D7A
- System (JASC)
- 7261 · Turbine Engine Oil System
- Part
- Breather Tube
- Condition
- Cracked
- Location
- Nr 3 Bearing
- Stage of operation
- CL
- Nature of condition
- A, T
- Precautionary procedure
- F, E, A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.