Click here to make tpub.com your Home Page

Page Title: JOAP ATOMIC EMISSION ROTRODE (Cont)
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home


   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 

NAVAIR 17-15-50.3
TM 38-301-3
T.O. 33-1-37-3
CGTO 33-1-37-3
ENGINE:
F101-GE-400 (Cont)
AIRCRAFT:
(F-14B) (F-14D)
1. A sudden increase (9-11 ppm for emission) of Fe may indicate main bearing distress; small amounts or Ag
may accompany the Fe.
2. A moderate increasing trend of Fe may indicate excessive wear of gears and gearshaft splines.
3. For a confirmed significant (8-9 ppm) Ti reading, the Nos. 1, 2 and possible No. 3 bearing inner races may be
turning on the inner race journals.
4. Lube and scavenge pump bearing distress may be indicated by trends in Fe and Cu together. Al may
accompany the Fe and Cu.
5. Increasing trends in Fe may indicate gearbox problems. Al and Ag wear metals may accompany the increase
in Fe.
6. Cr is used on Nos. 4 and 5 bearing journals and may be used for repair of gearbox bearing journals. Increasing
Cr may indicate inner race spinning on the journals.
7. Inspect chip detectors when increases in JOAP wear metals cause concern; debris in the chip detector may
indicate part distress.
8. The main engine bearings may fail without indication reflected in the JOAP analysis. Spalling of these bearings
are detected by chip detectors.
9. High Si indicates oil contamination, possibly from the oil servicing cart, engine wash chemicals, or hydraulic
pump torque motor servo valve damping fluid. High Si content in oil sampled from the Hydraulic Pump with
Normal Range Si content in the oil sampled from the Lube and Scavenge Pump oil would indicate leakage of the
Hydraulic Pump Torque Motor Servo Valve damping solution, Hydraulic Pump replacement is recommended.
The oil-servicing cart should be checked for contamination and, if contamination is confirmed, shall be drained
and flushed. The engine shall be drained and flushed to remove Si contamination. Post maintenance samples
from the engine and oil-servicing cart, if applicable, shall be analyzed by the OAP laboratory to assure all Si
contamination has been removed.
10. Abnormal trend or high level of Zn is not indicative of a failure unless accompanied with an abnormal trend or
high level in Cu (fuel boost pump bearings).
11. Abnormal trend or high level or Mo is not indicative of a failure unless accompanied with an abnormal trend or
high level in Fe and Cr.
12. When high levels of Fe or Cu are noted, additional oil samples should be taken from the hydraulic drain port
on the oil tank. This may isolate the source of wear metal to either the lube system or hydraulic system. When the
hydraulic system is generating wear metal, the wear metal concentration in the hydraulic oil sample will be
significantly higher than the wear metal concentration in the lube oil sample.
A-90

Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business