the aircraft is assigned. The MAP is the source of information for most entries in the aircraft logbook; for flight and operating hour entries, utilization reports should be used. Entries must be typewritten or printed in black ink, except in those cases where temporary entries are allowed to be made in pencil. Entries are NOT to be made with felt-tipped pens. In most operating activities, the logbook clerk will make the actual aircraft logbook entries. However, rarely will logbook clerks be authorized to sign aircraft logbook record entries. The following personnel are authorized to sign aircraft logbooks and records: Commanding officer Organizational-level maintenance officer Intermediate-level maintenance officer Depot-level director of operations Operations maintenance division (OMD) officer Additional personnel may be authorized to sign aircraft logbooks and records if they have been designated in writing to do so by one of the personnel listed above. When the contractor or naval aviation depot (NADEP) field team supervisor is not authorized or does not sign the required logbooks and records, the reporting custodian verifies the work performed and signs the necessary logbook and record entries. Rubber stamp signatures are not authorized. Signatures are not transcribed when a new logbook is initiated or when old logbooks or records are consolidated. The same date is used for all entries on the Inspection and Technical Directives pages, and in the Date Completed column of the Repair/Rework Record. The signature that appears on the Repair/Rework Record is certification that entries in the Inspection and Technical Directives pages are complete and correct as of that date. Subsequent record changes are treated as separate line items and signed accordingly. If logbooks or records must be transcribed, the person’s name who originally signed the entry should be typed or printed onto the new page preceded with /s/ to indicate that the page was transcribed. Use original documented dates only. Q9.  Logbook entries should be made under the direction of what officer of the station or unit to which the aircraft is assigned? Q10. The commanding officers, O-level maintenance officers, I-level maintenance officers, D-level directors of operations, and operations maintenance division (OMD) officers have authority to sign aircraft logs and records. What additional personnel may be authorized to sign aircraft logs and records? AIRCRAFT LOGBOOK FORMS LEARNING OBJECTIVE: Define the purpose of each record maintained in the aircraft logbook. An aircraft logbook is made up of forms for recording essential data. No other pages or forms, other than those described in OPNAVINST 4790.2, are to be inserted, stapled, or otherwise attached to the logbook. Additional data for which there is no designated place in the logbook are inserted in a manila envelope. This envelope is pasted inside the back of the logbook binder. This envelope should not become a catchall for data that should be an entry in the logbook, or that is not pertinent to the purpose of the logbook. A brief description and example of each logbook form is contained in the following paragraphs. Maintenance history cards (SRCs, MSR, ASR, EHRs) should appear in the order stated in the applicable Periodic Maintenance Information Card (PMIC). Remember, you should always refer to the latest edition of OPNAVINST 4790.2 for detailed instructions when making entries in the aircraft logbook. NOTE: The aircraft logbook is in loose-leaf form; therefore, the model and bureau serial number (BUNO) of the applicable aircraft should be inserted on each page (in the spaces provided). This action ensures ready identification when pages are removed for entries or if logbook pages become separated from its logbook. STRUCTURAL LIFE LIMITS (OPNAV 4790/142) The Structural Life Limits form is generated at the squadron level. This form is used to maintain a current record of aircraft structural life-limited components designated for depot-level replacement that do not require SRC card or ASR documentation. These components, with their respective life limits, are listed in the applicable PMICs, interim rapid action changes, TDs, and Fixed Wing Aircraft Structural Life Limits, NAVAIRINST 13120.1, and Rotary Wing Aircraft Structural Life Limits, NAVAIRINST 13130.1. The record is shown in figure 6-1. 6-4