TB 1-2835-205-20-4
b. If the APU serial number is listed paragraph 9.b. below, it has a compressor wheel which was in-
spected during depot overhaul. Determine the time it has been operating since the inspection. If hours cannot
be determined, contact either 2410 Hotline (listed in para 16.d.) or logistical POC (listed in para 16.b.).
NOTE
All historical record data for APU hours refers to aircraft operating time,
not APU operating time.
c. The TSN (8.a. above and time since inspected if applicable (8.b. above). Calculate the starts accu-
mulated. Multiply the TSN and the aircraft time since inspected by 4. This calculated number of starts based
upon APU time since new will be used to determine the life limit and restrictions as stated in paragraph 9.c.
below as well as the basis for recording and maintaining APU starts in the future. The time since inspected
start number will be used to allow extended life of the APU wheel based upon the inspection and predicted
crack growth propagation.
Correction Procedures.
NOTE
The 5360 starts since new may only be exceeded if the APU's have un-
dergone NDI inspection of the compressor wheel. In this case an addi-
tional 2100 starts since inspection is authorized regardless of the original
starts since new.
a. Any APU exceeding 5360 starts is unserviceable (1340 times 4 equals 5360) and the aircraft will
be placed on a red //X// and reported as NMCM Depot, unless a NDI inspection of compressor wheel was
performed at overhaul or extension is authorized IAW paragraph 9.b.
b. The following T--62T--2B APU's have an operating limit of 2100 starts since inspection (SSI) (525
hours times 4 equals 2100 starts). For APUs listed use either starts since new (5360) or starts since inspec-
tion (2100) to establish the limit, whichever yields the greater remaining life. In addition, compressor wheels
inspected in the future will be identified with a serial number suffix //IW//. This will be reflected in the DA Form
2410 accompanying the unit. The compressor wheels in all T--62--2B APUs inspected at Cherry Point since
February 1996 have been NDI'd. If an APU's serial number is not listed below but it can be established
through the 2410 hotline or PMO that it has been through Cherry Point after February 1996, it will have an
additional 2100 starts or 525 hours of unrestricted use from the date and time of that inspection.
827502
827503
827504
827514
827516
827517
8275523
8275528
8375504
837508
837509
837511
837515
837519
837520
837523
837524
837525
847504
847507
847509
847512
847514
847515
847516
847519
847520
847523
847802
850606
857501
857519
857525
857529
857538
857540
857546
857548
857555
857565
857566
857567
857571
867501
867502
867503
867506
867508
867516
867519
867527
867532
867533
867535
867545
867548
867558
867591
867559
877501
877502
877505
877507
877508
877509
877525
877528
877529
877535
877539
877552
877556
877557
877562
877563
877564
877570
877572
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