Oil Consumption Program Input - Navy Aviation Maintenance ...
Naval Aviation Maintenance Oil Consumption Program
References:
1. OPNAV 4790.2G, Volume V, Chapter 9: Establishes policy, responsibilities, and requirements for monitoring aircraft equipment condition.
2. Aircraft/engine type Maintenance Instruction Manual (MIM) and Maintenance Requirement Cards (MRCs): Establishes specific T/M/S aircraft/engine requirements.
Objective:
The Oil Consumption Program
a. Establishes policy, responsibilities, and requirements for monitoring aircraft equipment condition in an effort to detect impending failures without equipment removal or extensive disassembly.
b. Provides Navy and Marine Corps Organizational-level maintenance activities the guidance necessary to achieve required performance, efficiency, and logistic support by establishing policy for integrated oil consumption requirements. All aspects of oil consumption/servicing, documentation, and trend analysis are critical to flight safety.
Background:
In 1994, as a result of the loss of two aircraft due to inadequate attention to engine oil consumption limits, a recommendation was made to formalize engine oil consumption as a NAMP program. Establishment of oil consumption as a formal NAMP process monitored by Quality Assurance, was the only alternative which would provide continuing routine attention and awareness of this vital subject. Effective monitoring of engine oil consumption is a critical indicator of engine integrity. Early detection of an abnormal usage trend can result in the repair or removal from service before a major component failure occurs.
Effectiveness:
The collective efforts between the Program Manager providing quality training, maintenance personnel performing the servicing/documentation requirements, Q/A monitoring/trend analysis, and Maintenance Control ensuring oil consumption rates are calculated and documented prior to release of aircraft as safe for flight ensure the effectiveness of the Oil Consumption Program. In addition, pilots/aircrew are also trained in oil consumption servicing /procedures and responsibilities. It helps identify those aircraft engines that normally have a low oil consumption rate per flight hour, as it provides a means of early detection in an effort to prevent loss of aircraft and engines.
The effectiveness of the oil consumption program is measured in the Navy Safety Center mishap program data. The oil consumption data was obtained from mishaps where aircraft had a history of high oil consumption. One Class A mishap in 1993 states as a causal factor that a “standard reporting program for monitoring aircraft model engine oil consumption was not established.” The majority of the mishaps queried revealed components failing due to absence of oil. The small number of mishaps indicate that the program is providing the attention necessary to prevent unnecessary mishaps.
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