be replaced; for example, a 500-hour component installed on an aircraft with 795 'hours will have an entry of 1,295 hours in the replacement due block. An item with a 6-month time interval installed on 23 FEB 91 will have a 23 AUG 91 entry in the replacement due block.

Part number - Enter the part number of the item.

Serial number - Enter the serial number of the item.

CFA - Enter the cognizant field activity responsible for the SRC item.

SECTION II - INSTALLATION DATA

Date - Enter the Julian date the item was installed on the aircraft/equipment; for example, 91205.

BUNO-SERNO installed on - Enter the bureau number of the aircraft or the serial number of the equipment on which the item is being installed.

Total aircraft/equipment hours or counts - Enter the hours/counts (whole numbers only) of the aircraft/equipment on which the item is being installed (time since new). Uncaptioned columns are provided for aircraft/equipment that have monitoring systems installed and may be labeled as required, such as low cycle fatigue (LCF) and equipment operating time (EOT). When aircraft/equipment do not have monitoring systems, use the first column only.

Total hours or counts on item - Enter the hours/counts (whole numbers only) since new and overhauled/reworked. Uncaptioned columns are provided and should be labeled with the appropriate information received, such as time since new (TSN) or time since overhaul/rework (TSO/TSR). If the item is new, the entry in the TSO/TSR column will be NEW. If the total hours/counts since new is not known, enter UNK in the TSN column.

SECTION III - REMOVAL DATA

Date - Enter the Julian date the item is removed; for example, 91220.

Total aircraft/equipment hours or counts - Enter the hours/counts of the aircraft/ equipment at time of removal of the item. Uncaptioned columns are used as described in section II.

Reason for removal and job control number - Enter the reason for removal and the JCN from the VIDS/MAF that was issued to remove the item from the aircraft /equipment.

SECTION IV - TECHNICAL DIRECTIVES

This section of the SRC card is completed in the same way as the TD form of the aircraft logbook (previously described). This section is strictly for TDs that apply to SRCs.

SECTION V - REPAIR/REWORK/OVERHAUL

Date - Enter the Julian date the repair/ rework/overhaul was accomplished; for example, 91225.

Activity - Enter the three position 3-M code of the activity accomplishing repair/rework/ overhaul; for example, D98.

Description - Indicate whether the item has been repaired/reworked/overhauled and a concise narrative of the maintenance performed.

Signature - A person having aircraft logbook signature authority signs this block.

A planned systematic removal and replacement of selected aeronautical components is considered an essential factor to ensure aircraft safety, mission capability, and operational reliability. Engineering analysis is used to determine if a component exhibits those characteristics that warrant overhaul or major component repair. At times, engineering analysis will reveal the need to adjust the operating interval of a particular component. In this case, it will be necessary to also adjust the SRC card to reflect these changes. For example, if a 500-hour replacement interval item is changed to a 300-hour replacement interval item, the replacement interval block must be adjusted. When official notification is received concerning a change in the time/cycle requirement of an SRC item, draw a line through the original entry and insert the new requirement directly above the lined out entry. The replacement due block must also be adjusted