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Engine and powerplant

STC SA1377GL

FAA DRS lists SA1377GL as Current · Reissued, held by Hershey Flying and Spraying Service, Inc., for Allied Ag Cat Productions G-164A and Allied Ag Cat Productions G-164B. Recorded change: Replace existing Pratt & Whitney (P & W) Model R-985 or R-1340 reciprocating engine installation installation with P & W (Canada) turbopropeller engine (Model PT6A-6B, -11, -11AG, -15AG, -20, -20A, -20B, -6/C20, -21, -27, -28, -34, -34AG, or -135) and Hartzell propeller (Model HC-BJTN-3 Hub and Model T10282 (+4) or T10282(N) (+4) Blades). Snapshot dated June 30, 2026.

FAA-listed holder
Hershey Flying and Spraying Service, Inc.
Aircraft configurations
2
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Replace existing Pratt & Whitney (P & W) Model R-985 or R-1340 reciprocating engine installation installation with P & W (Canada) turbopropeller engine (Model PT6A-6B, -11, -11AG, -15AG, -20, -20A, -20B, -6/C20, -21, -27, -28, -34, -34AG, or -135) and Hartzell propeller (Model HC-BJTN-3 Hub and Model T10282 (+4) or T10282(N) (+4) Blades).

SA1377GL 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: Allied Ag Cat Productions G-164A and Allied Ag Cat Productions G-164B. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Allied Ag Cat Productions G-164A1A16Allied Ag Cat Productions G-164B1A16

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Allied Ag Cat Productions G-164A and Allied Ag Cat Productions G-164B model, serial range, and configuration?
  2. 02Which powerplant configuration, limits, instruments, and maintenance data 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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