# Rolls-Royce VIPER MK 521

- Type: Engine model (FAA registry)
- Registry code: 54117
- Manufacturer (registry): ROLLS-ROYC
- Model: VIPER MK 521
- Engine type: Turbo-jet
- Power: 3,100 lb thrust
- Data sheet: [TCDS E3EU](https://openairdocs.org/tcds/E3EU) (OpenAirDocs)
- Holder: Rolls-Royce Deutschland Ltd & Co KG
- Installed in: 0 registered aircraft
- Page: https://openairdocs.org/engine/rolls-royce-viper-mk-521

Model codes come from the FAA registry's reference file.

## ADs that may apply (OpenAirDocs)

Matched to this engine model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

- [AD 2018-17-08](https://openairdocs.org/ad/2018-17-08): Compressor Section · Rolls-Royce Limited, Bristol Engines Division Viper Mk. 521, Viper Mk. 522 and Viper Mk. 601-22. Effective Sep 25, 2018
- [AD 98-26-07](https://openairdocs.org/ad/98-26-07): Fuel Pumps · Rolls-Royce Limited, Bristol Engines Division Viper Mk. 521 and Viper Mk. 522. Effective Feb 16, 1999
- [AD 98-25-14](https://openairdocs.org/ad/98-25-14): Barometric Flow Control Unit · Rolls-Royce Limited, Bristol Engines Division Viper Mk. 521, Viper Mk. 522, Viper Mk. 526 and 1 more. Effective Feb 12, 1999
- [AD 92-10-07](https://openairdocs.org/ad/92-10-07): High Pressure Compressor (HPC) Rotor Disks · Rolls-Royce Limited, Bristol Engines Division Viper Mk. 521, Viper Mk. 522 and Viper Mk. 601-22. Effective Sep 21, 1992

Historical (superseded or no longer in force):

- [AD 2016-03-03](https://openairdocs.org/ad/2016-03-03) (historical): Life-limited parts · Rolls-Royce Limited, Bristol Engines Division Viper Mk. 521, Viper Mk. 522 and Viper Mk. 601-22. Effective Apr 14, 2016

## Registered aircraft

None registered with this engine model now.

## NTSB investigations

None matched to aircraft with this engine model.

## FAA accident and incident reports

None matched to aircraft with this engine model.

## PMA parts (OpenAirDocs) (1)

Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this engine model on its data sheet, so check the FAA record before relying on it. Newest first.

- [FHE205-B](https://drs.faa.gov/browse/excelExternalWindow/7AA7EBC50605156C8525703F004A617A.0001): Igniter. Champion Aerospace LLC · Replaces Rolls Royce CBS-116 · Dec 6, 1988

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