# N9125M: 1968 Siller Helicopters CH-54A - Status: Valid registration - Airframe: [Siller Helicopters CH-54A](https://openairdocs.org/model/siller-helicopters-ch-54a) (registry code 8142567, 20 seats) - Engine: [Pratt & Whitney JFTD12A-4A](https://openairdocs.org/engine/pratt-whitney-jftd12a-4a) (registry code 51502) - Data sheets: [TCDS H18NM](https://openairdocs.org/tcds/H18NM) (Siller Helicopters LLC), [TCDS E15EA](https://openairdocs.org/tcds/E15EA) (Erickson Incorporated DBA Erickson Air-Crane) (OpenAirDocs) - Serial number: 68-18455 - Year built: 1968 - Type: Rotorcraft - Engine type: Turbo-shaft - Airworthiness: Restricted, agriculture and pest control, forest, other - Airworthiness date: June 29, 2012 - Certificate issued: July 8, 2009 - Expires: October 31, 2027 - Mode S code: ACA12C - Registered owner: [Siller Helicopters LLC](https://openairdocs.org/faa-owner/SILLER%20HELICOPTERS%20LLC) - Location: [Chamblee, GA](https://openairdocs.org/faa-place/GA/Chamblee) - Owner type: Corporation - Owner's area on the map: 33.8885° N, 84.2895° W: Placed by OpenAirDocs at the center of ZIP code 30341, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=9125M - Page: https://openairdocs.org/aircraft/N9125M From the FAA registry file of October 24, 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. ## ADs that may apply (OpenAirDocs): 3 in force ### Matched by airframe (Siller Helicopters CH-54A) - [AD 2000-18-14](https://openairdocs.org/ad/2000-18-14): Second Stage Lower Planetary Plate · Siller Helicopters CH-54A. Effective Oct 19, 2000 ### Matched by engine (Pratt & Whitney JFTD12A-4A) - [AD 97-02-13](https://openairdocs.org/ad/97-02-13): Disk rupture · Pratt & Whitney Division JFTD12A-4A (T73P-1) and JFTD12A-5A (T73-P-700). Effective Apr 4, 1997 - [AD 71-24-05](https://openairdocs.org/ad/71-24-05): Compressor Rotor Discs · Pratt & Whitney Division JFTD12A-4A (T73P-1), JFTD12A-5A (T73-P-700), JT12A-6 and 2 more. Effective May 31, 1974 ## Information bulletins (advisory) None matched. ## NTSB investigations (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB LAX00LA018](https://openairdocs.org/ntsb/LAX00LA018), Oct 16, 1999: Sikorsky CH-54A (N9125M), Elko, NV, no damage, 1 fatal. Probable cause: the flight engineer's decision to climb a step ladder that put him in close proximity to the still turning main rotor blades. The gusting wind was a factor in the accident. ## FAA accident and incident reports (1) From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [Accident 19991016029129A](https://openairdocs.org/incident/19991016029129A), Oct 16, 1999: Skrsky CH54A (N9125M), Elko, NV, 1 fatal. (.19) On October 16, 1999, at 1410 hours pacific daylight time, a Sikorsky CH-54A, N9125M, was shutting down at Elko, Nevada, when a crewmember was struck by a… ## Reports on N9125M not matched to an aircraft (1) They name N9125M, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft. - [Incident 19901231061919I](https://openairdocs.org/incident/19901231061919I), Dec 31, 1990: Lear 55C (N9125M), Wichita, KS. Engine fire warning after takeoff. Shut engine down and returned for landing. ## Service difficulty reports None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. ## STCs that may be installed (OpenAirDocs) (9) 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 (Siller Helicopters CH-54A) - [STC SR11923SE](https://openairdocs.org/stc/SR11923SE): Installation of Helicopter Transport Services, LLC Shock Absorber HTS-2000. Helicopter Transport Services LLC - [STC SR02717SE](https://openairdocs.org/stc/SR02717SE): Installation of Helicopter Transport Services Remote Fuel Sump System. Helicopter Transport Services LLC - [STC SR02684SE](https://openairdocs.org/stc/SR02684SE): Installation of Helicopter Transport Services, LLC (HTS) lightweight firefighting refill pump. Helicopter Transport Services LLC - [STC SR00004SE](https://openairdocs.org/stc/SR00004SE): Fabrication and installation of Erickson fire fighting system. Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SR00815SE](https://openairdocs.org/stc/SR00815SE): Fabrication and installation of Erickson Model Sea Snorkel system. Erickson Air Crane Inc. dba Erickson Air-Crane - [STC SR02650LA](https://openairdocs.org/stc/SR02650LA): Installation of Fuel Quantity Indicating System (FQIS) Upgrade. Siller Helicopters Inc - [STC SR02055SE](https://openairdocs.org/stc/SR02055SE): Replacement tail rotor blades, Part Numbers 65161-00001-041MII and/or 65161-00001-043MII. Helicopter Transport Services LLC - [STC SR00931SE](https://openairdocs.org/stc/SR00931SE): Fabrication of Simplex Model 314 Fire Attack System. Simplex Manufacturing Company - [STC SA4302NM](https://openairdocs.org/stc/SA4302NM): Installation of Electronics Int'l digital automatic engine analyzer. Electronics International ## Earlier aircraft with N9125M The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N9125M before. - [Cancelled 1990-04-04](https://openairdocs.org/deregistered/N9125M-1990-04-04): Cessna 182P, S/N 18264688. N-number assigned, not yet registered ## Related - Other Siller Helicopters CH-54A aircraft: https://openairdocs.org/model/siller-helicopters-ch-54a/aircraft.md - The Pratt & Whitney JFTD12A-4A engine: https://openairdocs.org/engine/pratt-whitney-jftd12a-4a.md --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.