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Other aircraft modifications

STC SA3937NM

FAA DRS lists SA3937NM as Current · Amended, held by California Precision Hydraulics Inc, for McDonnell Douglas DC-9-51, McDonnell Douglas DC-9-81, and McDonnell Douglas DC-9-82, and 1 more aircraft configuration. Recorded change: Installation of Bell Industries Piston-Shoe Sub-assembly, Part No. 700001 as a replacement part for Sundstrand Part No. 728638, 700631, or SD1334 when used in Sundstrand Model No. 60AGD04 Constant Speed Drives (CSD). Part No. 700001 to be in accordance with Bell Industries Drawing No. 700001-A, -C, -D, -H, -J, and -L, Revision "A", dated December 17, 1984, or later FAA approved revisions. See continuation sheet. Snapshot dated June 30, 2026.

FAA-listed holder
California Precision Hydraulics Inc
Aircraft configurations
4
FAA revision date
FAA status
Current · Amended

Recorded modification

What the FAA record covers

Installation of Bell Industries Piston-Shoe Sub-assembly, Part No. 700001 as a replacement part for Sundstrand Part No. 728638, 700631, or SD1334 when used in Sundstrand Model No. 60AGD04 Constant Speed Drives (CSD). Part No. 700001 to be in accordance with Bell Industries Drawing No. 700001-A, -C, -D, -H, -J, and -L, Revision "A", dated December 17, 1984, or later FAA approved revisions. See continuation sheet.

SA3937NM identifies the approval, recorded holder, named aircraft, and modification scope. It does not confirm kit availability, serial-number effectivity, data rights, price, or installation authority.

Applicability

Aircraft named in FAA DRS

Named aircraft: McDonnell Douglas DC-9-51, McDonnell Douglas DC-9-81, and McDonnell Douglas DC-9-82, and 1 more aircraft configuration. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

McDonnell Douglas DC-9-51A6WEMcDonnell Douglas DC-9-81A6WEMcDonnell Douglas DC-9-82A6WEMcDonnell Douglas MD-88A6WE

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact McDonnell Douglas DC-9-51 and McDonnell Douglas DC-9-81, and 2 more aircraft configurations model, serial range, and configuration?
  2. 02Which configuration, parts, installation data, limitations, and ICAs apply?
  3. 03Who can legally supply the design data, kit, instructions, and ICAs?
  4. 04What parts, labor, conformity, and return-to-service work are excluded?

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