1-1. Scope. These procedures are applicable to
solution to this problem, until maintenance and
Direct Support and General Support levels. The
provisioning studies are finalized, at which time
pertinent information may be incorporated in
instructions are limited to the model described,
TM 92920-225-34 and TM 92920225-34P. The
but may also aid in repairing other 100 AMP
100 AMP regulator is illustrated in figure ll.
regulator (Solid State) models which may be in
use. Repair beyond that covered is permissible if
c. This bulletin contains instructions for the
time and skills are available.
repair of nine different models which are described
in the chapters listed below:
1-2. Purpose. This bulletin describes the checkout
Vap-Air (four models)
and repair procedures for the 100 AMP regulator
Leece-Neville (four models)
(Solid State), NSN 2920-00-900-7993.
Leland Airborne (one model)
1-3. General. a. The 100 AMP (Solid State) regu-
For simplicity, the regulator model numbers are
lator, NSN 2920009007993, procured under a
abbreviated with a portion of the last digits e.g.,
military standard performance-type specification.
Vap-Air model 2644000205 is abbreviated as
As such, the design and detail drawings are pro-
model 05, Leece-Neville model R0015027RA is ab-
prietary to each of the manufacturers and are
breviated as model 5027RA.
not available. At present, there are three suppliers
of the regulators:
d. A 100 AMP regulator checker is described in
chapter 5. In addition, TB 92300-409-30, (Gen-
erator System Tester (Go/No-Go), provides fabri-
Code Ident 35510 (FSCM)
cation instructions for a regulator test stand.
Leece-Neville Cleveland Div.
e. Replacement parts which are not identical
1374 E. 51 St.
with the original parts may cause a change in per-
Cleveland, OH 44103
formance of the regulator. The repair facility
Telephone AC 216 4310740
should remain aware of this possible performance
(2) DC Electronics.
change and use substitute parts with reasonable
Successors in 1978 to Vap-Air
caution. Replacement parts should be obtained
Code Ident 34904 (FSCM)
with the following priorities:
DC Electronics Inc.
(1) Where parts are available in the supply
544 N. Highland Ave.
system, the stock number is provided.
Aurora, IL 60506
(2) Where no stock number is available, the
Telephone AC 312844-5170
part should be either obtained from a non-repair-
(3) Leland Electrosystems Inc.
able regulator (cannibalization) or ordered from
Code Ident 07639 (FSCM)
Leland Electrosystems Inc.
(3) Appendix A lists all National Stock Num-
740 E. National Road
bers (NSNS) in ascending National Item Iden-
P.O. Box 128
tification Number (NIIN) sequence for quick
Vandalia, OH 45377
referral to the Federal Supply Code for Manufac-
Telephone AC 513898-5881
turer ( FSCM). Addresses for FSCMS are listed in
b. The 100 AMP regulator was originally desig-
(4) When all else fails, try a substitute part
nated as non-repairable. However, since fielding,
and monitor the performance of the repaired
the regulator has consistently appeared as a back
order item. This bulletin is provided as an interim