Appendix A: LABORATORY RECOMMENDATION CODES, NONAERONAUTICAL EQUIPMENT

NAVAIR 17-15-50.4

TM 38-301-4

T.O. 33-1-37-4

CGTO 33-1-37-4

APPENDIX A

LABORATORY RECOMMENDATION CODES, NONAERONAUTICAL EQUIPMENT

CODE

GENERAL LAB RECOMMENDATIONS

Sample results normal; continue routine sampling.

Analysis results supplied to customer; no recommendation required.

Previous recommendation still applies.

CODE

INSPECTION RECOMMENDATIONS (Requires Feedback)

H**

Inspect unit and advise lab of finding. Abnormal wear indicated by (PPM) (element).

Resample after (maintenance/*** hours/etc.)

K**

Impending failure, critical wear indicates by (element). Inspect unit and advise lab of findings.

Resample after (maintenance/*** hours/etc.).

L**

Inspect brake and clutch plate adjustments, change oil service filters, resample after *** hours

of operation.

M**

Perform engine coast-down check. If engine fails test, examine for discrepancy and advise

lab of results; otherwise, resample after *** hours of operation.

U**

Cooling system leak indicated by (Mg/Cr/Na/B). Inspect unit and advise lab of findings.

Resample after (maintenance/*** hours/etc.).

CODE

OIL CHANGE RECOMMENDATIONS (Requires Resample)

Change oil and service filters. Resample after *** hours of operation.

CODE

LAB REQUESTED RESAMPLES (Requires Resample)

Resample as soon as possible; do not change oil.

Resample after *** hours.

Do not change oil. Submit sample after ground or test run. Do not operate until after receipt of

laboratory result or advice.

Contamination suspected, do not change oil, resample unit and submit sample from new oil

servicing this unit

Stop purification, resample each engine after 4 hours of operation.

Unit 'wear-in' indicated; resample in accordance with break-in schedule or after *** hours.

Do not operate; do not change oil; submit resample as soon as possible.

Normal PPM was obtained from test cell run after complete P.E. where oil lubricated parts

were changed/removed/replaced. Monitor engine closely after installation to ensure a normal

trend before release to routine sampling.

NOTES:

*Resample (red cap) required

**Maintenance feedback required; advise laboratory of findings

***Laboratory will specify time limit

A-1