MIL-DTL-38769E
Management of Aircraft) (example; Work Unit Code 23130, Igniter Assembly, Action Taken Code R
- Remove and Replace) (see 3.2.5.2).
6.4.3 When discovered code. This code consists of one alphabetic or numeric character, and identiies
when a defect was discovered, or when a maintenance requirement was discovered, (i.e., during a
periodic inspection, in-light, etc.) (see 3.2.5.3).
6.4.4 How malfunction code. This code consists of three numeric characters, and is used to identify how
the equipment malfunctioned, (i.e., shorted, cracked, corroded, etc.). Codes applicable to reciprocating
engines should not be listed in TO 21M-AGM38A-06-1 (see 3.2.5.4).
6.4.4.1 Alphabetic and numeric sequence. Engine related HMCs are restricted. Engine maintenance
technicians are required to use codes from the engine related group for any items which are AFI 21-104
(Selective Management of Selected Gas Turbine Engines) reportable (see 3.2.5.4.1).
6.5 Support general codes. Support general codes are for recording production credit or repetitive
6.6 Unique data codes for MCS. Unique data codes for MCS are:
ALT00
Alert Duty. All man-hours expended while waiting for alert aerospace vehicles to takeoff
or land, such as strategic, defense, tactical, standing by for crash alert, or for alert
missile when no work is being accomplished. Not to be used for standby, awaiting work
assignments, lag or other delays, or when direct productive effort is being expended.
CMP00
Compensatory Time for Overtime. All direct assigned man-hours excused from normal
duty as a result of previously expended overtime man-hours.
DTL00
Detail, Squadron or Base Duties. Man-hours expended by direct labor personnel (labor
code 100) performing on-base duties such as charge of quarters, policing, building
maintenance, driver, dining hall, parade, commanders call, general military training,
nontechnical training, etc.
LVE00
Leave. Man-hours excused from duty, pass or oficial, military, medical, or sick leave.
TRN00
Maintenance Training. Man-hours expended in on-the-job training, formal and informal
maintenance technical training.
NOTE: These codes are to be used to account for man-hour expenditures of personnel with
an assigned "direct" labor code when performing one of the above functions. Documentation
guidance for AFTO Form 349 entries is contained in TO 00-20-2.
6.7 Work unit code. The WUC consists of ive characters, and is used to identify the system, subsystem,
or component on which maintenance is required, or was accomplished. WUCs will be reviewed and
approved during in-process reviews (see 3.2.8). For construction and application of WUCs, see Appendix A.
6.8 Development and preparation. Work Unit, Type Maintenance, Action Taken, When Discovered, and
How Malfunctioned Codes, and Support General WUCs will be in accordance with AFI 33-110 (Air Force
Data Administration Program) (see 3.1).
6.9 Test Program. Collection of maintenance management type data during a test program (AFI 99-101,
Developmental Test and Evaluation, or equivalent) will be in accordance with AFI 21-101 (Maintenance
Management of Aircraft) (see 3.1.9).
6.10 Code changes or additions. Changes or additions to type maintenance, action taken, when discovered,
and how malfunction codes will be in accordance with the requirements of AFI 33-110 (Air Force
Data Administration Program) (see 3.2.5).
6.11 Used with, but not part of. An item which extends the use of equipment beyond its assigned
functions, and is issued for use with that equipment only under special circumstances, is considered as used
with, but not part of, that equipment (see 3.2.8.1).
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