MEP-831A 3kW TQG: NSN Confusion Leads to Faulty Orders

BLUF: Invalid requisitions for the 400Hz frequency converter in MEP-813A 3kW TQG are due to error in old TM.
 

  This article was updated on 6/26/23.

Dear Editor,

The MEP-831A 3kW tactical quiet generator (TQG) set, NSN 6115-01-285-3012, is covered in TM 9-6115-639-13&P (Aug 17). Before this publication, there was an error with the callouts for the 60Hz and 400Hz frequency converters in the RPSTL. It listed NSN 5895-01-477-0858 as the 60Hz frequency converter, when this NSN was actually for the 400Hz frequency converter.

The correct NSN for the 60Hz frequency converter is NSN 5895-01-477-0855.

The problem is that requisitions are coming from the field for the 400Hz frequency converter, NSN 5895-01-477-0858, from DoDAACs that are not authorized a 400Hz TQG (MEP-832A, NSN 6115-01-287-2431).

Only the following units are authorized a 400Hz TQG (all LIN G74847):
 

UIC	DoDAAC
WZ4AAA	203d MI Bn (Compo 3), APG, MD
W4G8AA	C00VB6, W15P66, W15P7V, W37LY7, W56PHS, W56PHW, W58BW0, W58BXX, W58BXY, W81JF7, W81TK1, W900T9, W90282 US Army Communications-Electronics (Compo 1), AMC
W4GVAA	CG0UTK, CG0UTU, W15GK8, W15GK9, W15R7S, W56MMV, W56NSF, W56RTN, W58H6M, W58H9U, W58VME, W800U6, W800U7, W8083U, W8087P, W80KHR, W80SLL, W80YBX, W81DJP, W81JF3, W81LN5, W90653, W906DE, W90AGF, W90FPJ, W90QKH, W90QKJ, W90TER, W90XKS, W90YZK, W910UV, W910Z0, W91UQA, W91YLJ, US Army Communications-Electronics (Compo 1), AMC
W4T3AA	W582HJ, W900WA, W900XL, W900XM, Spec Ops Cmd, Central (Compo 1) DEF-S
WD78AA	W806QL, W90T5V, W90T5Z W90T6D, 264th Engr Co (Compo 1), FORSCOM
WVK3AA	W5047S, W569VT, W81ELU, W9082Z, 704th Engr Co (Compo 1), USARC
WBAVAA	W56EKA, W583PU, W58G4Z, W90BQV, W90BQW, W90BR1, W90X6D, W90X6F, W90X6G, 95th Engr Co (Compo 1) USARPAC
WJP8AA	W587GE, W90QWJ, Spec Trps Bn, 75th Ranger Regt (Compo 1) USARSOC
WH3LAA	W33GG3, W502HA, W584JV, W80HYE, W81W1U. 1st Bn, 75th Ranger Regt (Compo 1) USARSOC
WH3MAA	W587FY, W68PXK, W68SH9, and W81W14. 2nd Bn, 75th Ranger Regt (Compo 1) USARSOC
WJBLAA	W587FZ, W804F2. 3rd Bn, 75th Ranger Regt (Compo 1) USARSOC

CECOM averages 1-4 orders per week from units that are not authorized a 400Hz TQG and find that the orders are “invalid.” When the order is rejected, the following note is added in the Outbound to Customer Block on the Purchase Request Document stating:
The field density for the 400Hz 3KW TQG is very low and “valid” orders for the 400Hz frequency converter, NSN 5895-01-477-0858, are less than 10 per year. CECOM believes that even though the TM corrected the error in its last publication, units must still be working from an older TM version.

Units with questions can contact me at:
  CECOM

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Editor’s note: We’re glad to spread the word worldwide.