# N425DF: 1999 Marsh S-2F3AT

- Status: Valid registration
- Airframe: [Marsh S-2F3AT](https://openairdocs.org/model/marsh-s-2f3at) (registry code 5420000, 5 seats)
- Engine: [Honeywell TPE331-SER series](https://openairdocs.org/engine/honeywell-tpe331-ser-series) (registry code 33909)
- Data sheets: [TCDS T00009LA](https://openairdocs.org/tcds/T00009LA) (California Department of Forestry) (OpenAirDocs)
- Serial number: 152825
- Year built: 1999
- Type: Fixed wing multi engine
- Engine type: Turbo-prop
- Airworthiness: Restricted, forest
- Airworthiness date: March 16, 2005
- Certificate issued: August 30, 2001
- Expires: January 31, 2028
- Mode S code: A50E83
- Registered owners: [Usda Forest Service Fepp](https://openairdocs.org/faa-owner/USDA%20FOREST%20SERVICE%20FEPP), [California Department Of Forestry And Fire](https://openairdocs.org/faa-owner/CALIFORNIA%20DEPARTMENT%20OF%20FORESTRY%20AND%20FIRE), [Protection](https://openairdocs.org/faa-owner/PROTECTION)
- Location: [Mcclellan, CA](https://openairdocs.org/faa-place/CA/Mcclellan)
- Owner type: Government
- Owner's area on the map: 38.6626° N, 121.4008° W: Placed by OpenAirDocs at the center of ZIP code 95652, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=425DF
- Page: https://openairdocs.org/aircraft/N425DF

From the FAA registry file of October 22, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination. The registry lists only the engine series, so ADs for every Honeywell TPE331-SER model are included.

## ADs that may apply (OpenAirDocs): 42 in force

### Matched by airframe (Marsh S-2F3AT)

None in force.

### Matched by engine (Honeywell TPE331-SER series)

- [AD 2018-22-01](https://openairdocs.org/ad/2018-22-01): Turbine Section · Honeywell International TPE331-10, TPE331-10N, TPE331-10R and 8 more. Effective Dec 10, 2018
- [AD 2018-17-15](https://openairdocs.org/ad/2018-17-15): Turbine Engine Combustion Section · Honeywell International TPE331-1, TPE331-10, TPE331-10AV and 39 more. Effective Oct 22, 2018
- [AD 2018-13-05](https://openairdocs.org/ad/2018-13-05): Turbine Engine Reduction Gear · Honeywell International TPE331-1, TPE331-10, TPE331-10AV and 18 more. Effective Jul 26, 2018
- [AD 2016-21-07](https://openairdocs.org/ad/2016-21-07): Fuel control drive · Honeywell International TPE331-1, TPE331-10, TPE331-10AV and 26 more. Effective Nov 28, 2016
- [AD 2016-18-17](https://openairdocs.org/ad/2016-18-17): Compressor impeller · Honeywell International TPE331-10, TPE331-10AV, TPE331-10GP and 22 more. Effective Nov 4, 2016
- [AD 2015-18-03](https://openairdocs.org/ad/2015-18-03): Engine propeller shaft coupling failures · Honeywell International TPE331-10, TPE331-10R, TPE331-10U and 8 more. Effective Nov 13, 2015
- [AD 2012-02-06](https://openairdocs.org/ad/2012-02-06): First stage turbine disks · Honeywell International TPE331-10, TPE331-10AV, TPE331-10GP and 12 more. Effective Mar 15, 2012
- [AD 2011-18-51 R1](https://openairdocs.org/ad/2011-18-51-R1): Main shaft bearing · Honeywell International TPE331-1, TPE331-10, TPE331-10A and 82 more. Effective Oct 19, 2011
- [AD 2009-17-05](https://openairdocs.org/ad/2009-17-05): First stage turbine disks · Honeywell International TPE331-10, TPE331-10A, TPE331-10AV and 20 more. Effective Sep 1, 2009
- [AD 2006-14-03](https://openairdocs.org/ad/2006-14-03): New flight cycle counting method for first, second, and third-stage turbine rotors · Honeywell International TPE331-1, TPE331-10, TPE331-10A and 48 more. Effective Aug 9, 2006
- [AD 2004-09-29](https://openairdocs.org/ad/2004-09-29): First Stage Turbine Disks · Honeywell International TPE331-10, TPE331-10A, TPE331-10AV and 20 more. Effective Jun 15, 2004
- [AD 2002-25-02](https://openairdocs.org/ad/2002-25-02): First stage compressors implellers · Honeywell International TPE331-10, TPE331-10A, TPE331-10AV and 35 more. Effective Jan 21, 2003
- [AD 2002-21-15](https://openairdocs.org/ad/2002-21-15): Second stage turbine stator inner seal support · Honeywell International TPE331-1, TPE331-2, TPE331-2UA and 9 more. Effective Nov 26, 2002
- [AD 2002-12-09](https://openairdocs.org/ad/2002-12-09): Spectrometric Oil Analysis Program (SOAP) Sampling of Oil and Filter, Gearbox Components · Honeywell International TPE331-11U, TPE331-12B, TPE331-12JR and 3 more. Effective Jul 3, 2002
- [AD 2001-21-02](https://openairdocs.org/ad/2001-21-02): Airplane Flight Manual--Electronic Engine Controls · Honeywell International TPE331-10N, TPE331-12B and TPE331-8. Effective Nov 19, 2001
- [AD 98-12-09](https://openairdocs.org/ad/98-12-09): Fuel Manifold · Honeywell International TPE331-10, TPE331-10A, TPE331-10AV and 29 more. Effective Aug 7, 1998
- [AD 98-04-15](https://openairdocs.org/ad/98-04-15): Turbine Stators · Honeywell International TPE331-1, TPE331-2, TPE331-2UA and 9 more. Effective Apr 27, 1998
- [AD 97-15-10](https://openairdocs.org/ad/97-15-10): Engine Inlet Ice Protection · Honeywell International TPE331-10, TPE331-10A, TPE331-10AV and 39 more. Effective Sep 22, 1997
- [AD 96-06-11](https://openairdocs.org/ad/96-06-11): Engine Compressor Components · Honeywell International TPE331-14A, TPE331-14B, TPE331-14F and 1 more. Effective May 28, 1996
- [AD 95-16-08](https://openairdocs.org/ad/95-16-08): Life Limited Turbine Components · Honeywell International TPE331-1, TPE331-10, TPE331-10A and 62 more. Effective Sep 5, 1995
- [AD 94-26-07](https://openairdocs.org/ad/94-26-07): Fuel Control Governor Drive · Honeywell International TPE331-10, TPE331-10A, TPE331-10B and 32 more. Effective Apr 18, 1995
- [AD 94-09-08](https://openairdocs.org/ad/94-09-08): Third Stage Stator Turbine Assemblies · Honeywell International TPE331-1, TPE331-2, TPE331-2UA and 7 more. Effective May 20, 1994
- [AD 93-15-11](https://openairdocs.org/ad/93-15-11): Propeller Pitch Control (PPC) Gasket · Honeywell International TPE331-1, TPE331-10, TPE331-10A and 58 more. Effective Sep 7, 1993
- [AD 92-26-08](https://openairdocs.org/ad/92-26-08): Third Stage Stator Assemblies · Honeywell International TPE331-1, TPE331-2, TPE331-2UA and 7 more. Effective Jul 15, 1993
- [AD 93-05-09](https://openairdocs.org/ad/93-05-09): Third Stage Turbine Stator Assemblies · Honeywell International TPE331-1, TPE331-2, TPE331-2UA and 9 more. Effective Jun 28, 1993
- [AD 93-02-01](https://openairdocs.org/ad/93-02-01): Stratoflex Fuel Manifold Assemblies · Honeywell International TPE331-10, TPE331-10A, TPE331-10B and 21 more. Effective Mar 18, 1993
- [AD 89-07-07 R1](https://openairdocs.org/ad/89-07-07-R1): Oil Scavenge Pump Assembly · Honeywell International TPE331-1, TPE331-10, TPE331-10R and 26 more. Effective Oct 30, 1989
- [AD 86-08-06 R1](https://openairdocs.org/ad/86-08-06-R1): Second Stage Turbine Rotor Assembly · Honeywell International TPE331-25AA, TPE331-25AB, TPE331-25DA and 7 more. Effective Dec 21, 1987
- [AD 84-10-06 R1](https://openairdocs.org/ad/84-10-06-R1): Fuel Pump Assemblies · Honeywell International TPE331-1, TPE331-10, TPE331-10B and 45 more. Effective Dec 26, 1984
- [AD 84-01-04](https://openairdocs.org/ad/84-01-04): Third Stage Turbine Wheels · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 11 more. Effective Jan 25, 1984
- [AD 73-26-07 R3](https://openairdocs.org/ad/73-26-07-R3): Fuel Pump Shaft Internal Drive Splines · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 39 more. Effective Jul 31, 1980
- [AD 78-25-08 R3](https://openairdocs.org/ad/78-25-08-R3): Turbine Rotor · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 11 more. Effective Jun 12, 1980
- [AD 79-12-04](https://openairdocs.org/ad/79-12-04): Forged Third Stage Turbine Wheel Blade · Honeywell International TPE331-10. Effective May 10, 1979
- [AD 78-05-02](https://openairdocs.org/ad/78-05-02): Propeller Pitch Control Cam Follower Pin · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 11 more. Effective Apr 5, 1979
- [AD 76-16-01](https://openairdocs.org/ad/76-16-01): Bearing Oil Transfer Tube · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 11 more. Effective Aug 6, 1976
- [AD 75-10-05](https://openairdocs.org/ad/75-10-05): Torque Sensor Assembly Mounting Arm · Honeywell International TPE331-1, TPE331-2, TPE331-3U and 3 more. Effective Jul 11, 1975
- [AD 74-10-10](https://openairdocs.org/ad/74-10-10): Fuel Control Assembly Support Bracket · Honeywell International TPE331-1, TPE331-2, TPE331-3U and 2 more. Effective Jul 11, 1975
- [AD 74-24-05](https://openairdocs.org/ad/74-24-05): Propeller Pitch Control Sleeve Assembly · Honeywell International TPE331-3U, TPE331-3UW, TPE331-5 and 1 more. Effective Nov 26, 1974
- [AD 70-19-02](https://openairdocs.org/ad/70-19-02): High Speed Pinion Bearings · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 3 more. Effective Feb 20, 1974
- [AD 71-05-07](https://openairdocs.org/ad/71-05-07): High Speed Pinion Assembly · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 30 more. Effective Apr 8, 1972
- [AD 70-16-09](https://openairdocs.org/ad/70-16-09): High Speed Pinion Assembly · Honeywell International TPE331-3W
- [AD 70-04-04](https://openairdocs.org/ad/70-04-04): High Speed Pinion Retaining Nut · Honeywell International TPE331-1, TPE331-1U, TPE331-1UA and 3 more

### Historical (superseded or no longer in force)

- [AD 2018-02-14](https://openairdocs.org/ad/2018-02-14) (historical): Turbine Engine Combustion Section · Honeywell International TPE331-1, TPE331-10, TPE331-10AV and 38 more. Effective Feb 28, 2018
- [AD 2015-12-04](https://openairdocs.org/ad/2015-12-04) (historical): Fuel control unit (FCU) · Honeywell International TPE331-1, TPE331-10, TPE331-10AV and 26 more. Effective Jul 22, 2015
- [AD 2011-18-51](https://openairdocs.org/ad/2011-18-51) (historical): Main shaft bearing · Honeywell International TPE331-1, TPE331-10, TPE331-10A and 82 more
- [AD 2006-15-08](https://openairdocs.org/ad/2006-15-08) (historical): Woodward fuel control unit (FCU) assemblies · Honeywell International TPE331-1, TPE331-10, TPE331-10AV and 26 more. Effective Aug 24, 2006
- [AD 88-12-10](https://openairdocs.org/ad/88-12-10) (historical): Turbine Rotor · Honeywell International TPE331-10, TPE331-10R, TPE331-10U and 6 more. Effective Jun 6, 1988
- [AD 92-02-19 PL](https://openairdocs.org/ad/92-02-19-PL) (historical): Fuel Manifold Assembly Leak · Honeywell International TPE331-10, TPE331-10A, TPE331-10AV and 29 more
- [AD 91-04-02](https://openairdocs.org/ad/91-04-02) (historical): Third stage stator assembly · Honeywell International TPE331-1, TPE331-2, TPE331-2UA and 7 more
- [AD 90-21-01](https://openairdocs.org/ad/90-21-01) (historical): Third stage stator assembly · Honeywell International TPE331-1, TPE331-2, TPE331-2UA and 7 more

## Information bulletins (advisory) (4 in force)

- [SAIB NE-16-19](https://openairdocs.org/saib/NE-16-19): Turbine Engine Compressor Section  Stator Nozzle Distress. Issued Jul 22, 2016
- [SAIB NE-16-18](https://openairdocs.org/saib/NE-16-18): Power Lever  Loss of Power Control. Issued Jul 11, 2016
- [SAIB NE-06-70](https://openairdocs.org/saib/NE-06-70): . Issued Sep 25, 2006
- [SAIB NE-06-69](https://openairdocs.org/saib/NE-06-69): . Issued Sep 20, 2006

## NTSB investigations

None matched to N425DF.

## FAA accident and incident reports

None matched to N425DF.

## Service difficulty reports (1)

As reported by operators and repair stations. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR 99ZZZX4084](https://openairdocs.org/sdr/99ZZZX4084), Sep 23, 1999: PUMP. FAILED. DURING PRODUCTION FLIGHT TESTING, THE LEFT ENGINE WAS SHUT DOWN SEVERAL TIMES IN-FLIGHT. ON THE 6TH TIME, THE PROPELLER WOULD NOT UNFEATHER ALLOWING AN ENGINE R

## STCs that may be installed (OpenAirDocs) (21)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the airframe (Marsh S-2F3AT)

- [STC ST01159LA](https://openairdocs.org/stc/ST01159LA): Installation of a nose wheel. Marsh Aviation Company

### Approved for the engine (Honeywell TPE331-SER series)

- [STC SE02538AK](https://openairdocs.org/stc/SE02538AK): Modification of Honeywell TPE331-12JR-702TT engine. TAE Aerospace (CTEC). Lists TPE331-12JR
- [STC SE03035AT](https://openairdocs.org/stc/SE03035AT): Installation of Royal Atlantic Aviation Engine Oil Filter Bypass Warning System, Kit P/N RAA2003-1-1. Reds Aircraft Service Inc. Lists TPE331-10N
- [STC SE00265AT](https://openairdocs.org/stc/SE00265AT): Install Ayres Fuel Manifold Purge Assembly Kit, P/N 21757-1 in accordance with "Installation Instructions - Ayres P/N 21757-1 Fuel Manifold Purge Assy-Kit" Dwg. No. 21757-1(1), Revision none, dated April 20, 1993, or later FAA approved revision. Thrush Aircraft Inc. Lists TPE331-1
- [STC SE2924SO](https://openairdocs.org/stc/SE2924SO): Installation of Garrett TPE-331-10 combustor and turbine in the TPE331-8 engine. National Flight Lakeland. Lists TPE331-8
- [STC SE01461NY](https://openairdocs.org/stc/SE01461NY): Propeller pitch control system modification. Hartzell HC-E4N-5D/D9690(B) propeller installed per STC SA01462NY. Not approved on serial numbers TC-398 through TC-418. Hartzell Propeller Inc. Lists TPE331-10UA
- [STC SE01604CH](https://openairdocs.org/stc/SE01604CH): Convert Honeywell TPE331-10AV-511B to a TPE331-10AV-511KA. National Flight Services, Inc. Lists TPE331-10AV
- [STC SE00229AT](https://openairdocs.org/stc/SE00229AT): Installation of Garrett TPE331-10 Combustor and Turbine in TPE331-6 engine. National Flight Services, Inc. Lists TPE331-6
- [STC SE00275AT](https://openairdocs.org/stc/SE00275AT): Installation of GarrettTPE331-10 combustor and turbine in the TPE331-5 engine. National Flight Services, Inc. Lists TPE331-5
- [STC SE00691CH](https://openairdocs.org/stc/SE00691CH): Modification of a turboprop engine to a turboshaft configuration by incorporation of AlliedSignal (Garrett) TSE331-3U turboshaft gearbox components and other associated changes. National Flight Services, Inc. Lists TPE331-10UA
- [STC SE383CH](https://openairdocs.org/stc/SE383CH): Modification of engines. National Flight Services, Inc. Lists TPE331-1
- [STC SE7547SW](https://openairdocs.org/stc/SE7547SW): Install Garrett P/N 865558-16 or865558-1E propeller pitch control cam. Peacock Joe N. Lists TPE331-25A
- [STC SE8029SW](https://openairdocs.org/stc/SE8029SW): Modify propeller pitch control, P/N 869130, by installing pitch control cam, Garrett P/N869386-1. Agri Jet Power, Inc. Lists TPE331-1
- [STC SE1725CE](https://openairdocs.org/stc/SE1725CE): Modification to replace torque pressure compensator with a plug for raw torque pressure indicating provision. Air Midwest, Inc. Lists TPE331-3UW
- [STC SE33WE](https://openairdocs.org/stc/SE33WE): Modification of: ( 1) Manual fuel valve and beta cams; (2) Fuel control linkage and propeller servo cam; and (3)Automatic control of bleed valve and engine starting functions; S/N P61801 only. Garrett Turbine Engine Company A Division of the Garrett Corporation. Lists TPE331-25D
- [STC SE35WE](https://openairdocs.org/stc/SE35WE): Modification of the fuel control, linkage to permit 75% r.p.m. for low ground idle. Garrett Turbine Engine Company Division of Garret Corporation. Lists TPE331-47
- [STC SE39WE](https://openairdocs.org/stc/SE39WE): Modification of the fuel control linkage to permit 75% r.p.m. for ground idle doe S/N 86001. Garrett Turbine Engine Company A Division of the Garrett Corporation. Lists TPE331-57
- [STC SE50WE](https://openairdocs.org/stc/SE50WE): One engine only. Modification of a Model TPE331-25DAL to. incorporate the engine components associated with a torque and temperature 1imitinq system in accordance with AiResearch Kit PIN 896642-1. An en9ine incorporating this kit is reidentified as a Model TPE331-25DALT . Garrett Turbine Engine Company Division of Garret Corporation. Lists TPE331-25DA
- [STC SE68WE](https://openairdocs.org/stc/SE68WE): Deletion of fireshield installation kit. West-Figueroa Trust. Lists TPE331-6
- [STC SE56WE](https://openairdocs.org/stc/SE56WE): Serial Numbers P-06012 AND P-06024: Installation of heated compressor inlet temperature sensor lines. AiResearch Manufacturing Company. Lists TPE331-5
- [STC SE38WE](https://openairdocs.org/stc/SE38WE): Modification of fuel control linkage to permit operation of 75% idle speed. S/N 61701 & 61702. Garrett Turbine Engine Company Division of Garret Corporation. Lists TPE331-55

## Earlier aircraft with N425DF

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N425DF before.

- [Cancelled 1998-09-02](https://openairdocs.org/deregistered/N425DF-1998-09-02): Grumman TS-2A, S/N 136583. Triennial form not returned. Owner: [California Dept Of Forestry](https://openairdocs.org/faa-owner/CALIFORNIA%20DEPT%20OF%20FORESTRY), [Mather, CA](https://openairdocs.org/faa-place/CA/Mather)
- [Cancelled (date not recorded)](https://openairdocs.org/deregistered/N425DF-undated): Grumman S2F-1, S/N 527

## Related

- Other Marsh S-2F3AT aircraft: https://openairdocs.org/model/marsh-s-2f3at/aircraft.md
- The Honeywell TPE331-SER series engine: https://openairdocs.org/engine/honeywell-tpe331-ser-series.md

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