POTENTIAL SOURCES OF WEAR METALS TO AID TROUBLESHOOTING

NAVAIR 17-15-50.3

TM 38-301-3

T.O. 33-1-37-3

CGTO 33-1-37-3

ENGINE:

F110-GE-100 (Cont)

AIRCRAFT:

(F-16)

d. When a wear metal concentration level is in the abnormal category.

e. When element(s) exceed the abnormal trend limit.

11. Engines with less than 100 flying hours since new may exhibit Fe trending and concentrations that exceed the

limits prescribed in the tables. This is due to initial break-in of oil lubricated parts and the cleaning action of

the oil which may remove microscopic manufacturing residues. For such engines, the following iron trending

and concentration limits apply, provided that all other wear metal concentrations, oil consumption and master

chip detector (MCD) inspections are normal/within limits.

a. During the first 25 hours of flight, the maximum acceptable rate of Fe increase is 6 PPM in 10 engine

flight hours (EFH), and the maximum acceptable concentration is 19 PPM.

b. Between 25 and 60 flight hours, Fe trending must not exceed 4 PPM in 10 EFH, and the concentration

must not exceed 19 PPM.

Between 60 and 100 flight hours, Fe trending must not exceed 3 PPM in 10 EFH, and the concentration

must not exceed 19 PPM. For any given engine, the rate at which the maximum concentration drops will

depend on the rate of oil consumption. Once Fe trending has dropped to 3 PPM or less in 10 EFH, a

drain and re-service may be performed to reduce any high concentrations of Fe.

d. Engines exhibiting Fe trend/concentration within these limits shall remain on normal surveillance (Code

A). After the engine has accumulated 100 flight hours, the trending and concentration limits defined in the

tables must be applied.

12. F110-GE-100 engine maximum allowable consumption is 1.5 half-pints per EOT. Consumption inspection is

recommended at every servicing (calculated). If the maximum consumption rate is exceeded, troubleshooting per

applicable technical order (2J-F110-3-9, 2J-F110-6-4, 2J-F110-6-13, or 1F-16CJ-70FI-00-11.)

13. F110-GE-100 engine lubrication system attributes differ according to which oil tank is mounted, as follows:

P/N 1583M89G01

P/N 7127M47G02

Lube Capacity - Full

(half-pints)

Volume from "fill"

Line to "full" line

(half-pints)

POTENTIAL SOURCES OF WEAR METALS TO AID TROUBLESHOOTING

1. Main bearings or gearshafts:

a. a sudden increase of Fe may indicate main bearing distress; small amounts of Ag and Ni may accompany

the Fe.

b. A moderate increasing trend of Fe may indicate excessive wear of gears and gearshaft splines.

c. For a confirmed significant Ti reading (8-9 ppm for emission), the numbers 1 and 2, and possible number

3 bearing inner races may be turning on the inner race journals.

A-83