parts or unplanned shutdown that affects the operation of internally enclosed lubricated parts Immediately after an accident regardless of cause and resulting damage Prior to overseas deployment or redeployment of equipment already being monitored by oil analysis Whenever excessive vibration or chip detector light indication is experienced on an aircraft engine during flight, ground, or test run Immediately following an operation in which an abnormal condition or incident occurred that resulted from either malfunction of the oil lub- rication system or damage to the oil-lubricated system from excessive engine oil loss, low engine oil pressure, or zero engine oil pressure. Whenever oil analysis is initiated or terminated or when the monitoring laboratory changes, the logs and records clerk should make an entry to indicate the changed oil analysis status on the Miscellaneous/ History record in the aircraft logbook or equipment aeronautical equipment service record (AESR). For assembly service record (ASR) and scheduled removal component (SRC) card items, this entry is made in the Repair/Rework/Overhaul section of the record or card. For equipment history record (EHR) card items, this entry should made in the maintenance record section of the record. Whenever equipment is removed or transferred, a specific entry is made concerning the NOAP analytical status of the equipment. An Oil Analysis Request, DD Form 2026, shown in figure 5-25, should accompany each oil sample that is sent to the JOAP laboratory. Equipment logbooks are the sources of much of the data that is entered on the DD Form 2026. FUNCTIONAL CHECK FLIGHT A functional check flight (FCF) determines whether an aircraft airframe, engine or engines, accessories, or equipment is functioning according to established standards while the aircraft operates in its intended environment. The flight is performed when it is not possible to determine proper operation by a ground check. A functional check flight is NOT required after a phase inspection unless the corrective action for the discrepancy that was discovered during the inspection requires one, or unless the item that is inspected 5-37 requires removal, disassembly, adjustment, alignment, reinstallation, or re-assembly. Some of the situations that require a check flight include the following: After completion of aircraft rework When a reporting custodian accepts a newly assigned aircraft and when an aircraft returns to a reporting custodian from rework After the installation or reinstallation of an engine, propeller, propeller governor, major fuel system component, helicopter drive train, transmission, or gearbox When a fixed flight surface has been installed or reinstalled When a movable flight control surface has been installed, reinstalled, or re-rigged When an aircraft with a single primary attitude source per pilot station has had the attitude indicator or display, attitude source, subsystem, or component removed, replaced, or adjusted When an aircraft with dual or multi-independent attitude reference sources has had the indicators or displays, attitude sources, subsystems, or components removed, adjusted, or replaced in two or more of the attitude systems When an aircraft has not flown in 30 days or more and is returned to flight status When any condition that is cited in the appli- cable naval air training and operating proce- dures standardization (NATOPS) manual occurs NAVAIR issues functional check flight (FCF) checklists as NAVAIR 01-XXX-1-F NATOPS FCF checklists. These checklists are constructed by abbreviating the FCF procedures that are contained in the applicable NATOPS manual. FCF checklists should be prepared locally for aircraft that do not have published checklists, for example, aircraft that are on loan from other services. The check flight checklist contains provisions for listing pertinent items or aircraft systems to be observed during the check flight and for recording instrument indications. Additionally, space should be provided for indicating satisfactory or unsatisfactory performance of all listed items or systems. Finally, a “remarks” section is required so that detailed comments and recommendations about the flight can be made in narrative form if desired.