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Engine and powerplant

STC SA1157NW

FAA DRS lists SA1157NW as Current · Reissued, held by United Airlines Inc, for Boeing 747-100 Series. Recorded change: Removal of the JT9D-3A engine fan case splitter (per United Air Lines COA 8-1464, ER #6) from the Boeing - 100A nacelles (blow-in-door inlets). FAA Approved Airplane Flight Manual Supplement for the Model 747-122 is required as part of this approval. Snapshot dated June 30, 2026.

FAA-listed holder
United Airlines Inc
Aircraft configurations
1
FAA revision date
FAA status
Current · Reissued

Recorded modification

What the FAA record covers

Removal of the JT9D-3A engine fan case splitter (per United Air Lines COA 8-1464, ER #6) from the Boeing - 100A nacelles (blow-in-door inlets). FAA Approved Airplane Flight Manual Supplement for the Model 747-122 is required as part of this approval.

SA1157NW 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: Boeing 747-100 Series. Confirm the approved model list, serial effectivity, configuration, and certificate revision.

Boeing 747-100 SeriesA20WE

Buyer checks

Confirm before sourcing

  1. 01Does it cover the exact Boeing 747-100 Series 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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