APPENDIX A - RECOMMENDATIONS
STANDARD LAB RECOMMENDATION CODES - AERONAUTICAL FOR SPECTROMETRIC ANALYSIS
GENERAL LAB RECOMMENDATIONS
Sample results normal; continue routine sampling.
Analysis results supplied to customer; no recommendation required.
Previous recommendation still applies.
INSPECTION RECOMMENDATIONS (Requires Feedback)
Inspect unit and advise lab of finding. Abnormal wear indicated by *** PPM (element).
Do not fly or operate; inspect filters, screens, chip detector and sumps; advise laboratory of results.
Do not fly or operate. Examine for discrepancy and advise laboratory of results and disposition. If
discrepancy found and corrected, continue operation and submit resample after *** hours of operation. If
discrepancy is not found, recommend remove component from service and send to maintenance.
OIL CHANGE RECOMMENDATIONS (Requires Resample)
Contamination confirmed. Change oil, sample after *** minute run-up and after *** operating hours.
NOTE: Contamination is defined as water, coolant, silicon, etc. and not wear metals.
appropriate recommendation codes for increasing trends or elevated wear- metal conditions.
Contamination suspected. Change oil; run for *** additional hours, take samples hourly. (This code is for
Air Force ALC Depot use only).
LAB REQUESTED RESAMPLES (Requires Resample)
Resample as soon as possible; do not change oil.
Resample after *** hours; do not change oil.
Do not change oil. Restrict operations to local flights or reduced load operation, maintain close
surveillance and submit check samples after each flight or *** operating hours until further notice.
Do not change oil. Submit resample 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
Do not fly or operate; do not change oil; resubmit resample as soon as possible.
Normal PPM reading 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.
*Resample (red cap) required
**Maintenance feedback required; advise laboratory of findings
***Laboratory will specify time limit