# Silver Bay Logging CH-54A - Type: Aircraft model (FAA registry) - Registry code: 8160000 - Manufacturer (registry): SILVER BAY LOGGING INC - Model: CH-54A - Aircraft type: Rotorcraft - Category: Rotorcraft - Engines: 1 · Turbo-shaft - Seats: 20 - Weight class: Up to 12,499 lb - Certification: Type certificated - Data sheet: [TCDS H17NM](https://openairdocs.org/tcds/H17NM) (OpenAirDocs) - Holder: Silver Bay Logging Inc. - Registered aircraft: 0 - Page: https://openairdocs.org/model/silver-bay-logging-ch-54a Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker. ## ADs that may apply (OpenAirDocs) Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment. - [AD 2023-11-07](https://openairdocs.org/ad/2023-11-07): Ground Proximity System · Airbus Helicopters 47, 206, 210 and 237 more. Effective Jun 22, 2023 Historical (superseded or no longer in force): - [AD 2021-23-13](https://openairdocs.org/ad/2021-23-13) (historical): Ground Proximity System · Airbus Helicopters K-225, K-190A, K-240 and 237 more. Effective Dec 9, 2021 - [AD 99-07-16](https://openairdocs.org/ad/99-07-16) (historical): Second Stage Lower Planetary Plate · Columbia Helicopters CH-54A and CH-54A. Effective May 6, 1999 ## Registered aircraft None registered with this model now. ## 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 ANC96FA098](https://openairdocs.org/ntsb/ANC96FA098), Jul 13, 1996: Sikorsky CH-54A (N541SB), Ketchikan, AK, destroyed, 1 fatal. Probable cause: failure of the number 5 tailrotor bearing. A factor relating to the accident was: the uneven/steep sloping terrain, where the pilot was forced to land. Possible factors were: inadequate… ## 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 19960713016949A](https://openairdocs.org/incident/19960713016949A), Jul 13, 1996: Skrsky CH54A (N541SB), Ketchikan, AK, Destroyed, 1 fatal. On logging expedition when rotor blade strcuk trees. (.4)the pilot & copilot were on an external load, aero logging operation in a military surplus helicopter,… ## Service difficulty reports (7) As reported by operators and repair stations, by the model named in the report. - [SDR H3V2007F00000](https://openairdocs.org/sdr/H3V2007F00000), Jul 8, 2007: PIN. MISSING. ON JULY 8, 2007, HLH EXPERIENCED A HARD GROUND ROLLOVER OF AC. INITIAL INSPECTION OF THE WRECKAGE REVEALED A SERVO PIN, PN 6465-20201-101, FROM THE LT LATERAL S - [SDR HL01102006001](https://openairdocs.org/sdr/HL01102006001), Oct 31, 2006: BEARING. FAILED. MAIN GEAR BOX BEGAN MAKING METAL, THIS WAS NONFERROUS METAL, UPON REMOVAL AND DISASSEMBLY IT WAS DISCOVERED THAT THE 1ST STAGE PLANETARY BEARING, P/NSB2410-2 HA - [SDR H3V2005F00000](https://openairdocs.org/sdr/H3V2005F00000), Jul 19, 2005: STATOR. DAMAGED. FOD DAMAGE FROM RIVETS OF THE 1ST STAGE STATOR REAR AIRSEAL (2ND STAGE) DAMAGED THE COMPRESSOR BLADES. THIS CAUSED A STALL AND THE T5 TEMP ROSE TO 1000 DEGREES - [SDR JYD2001F00001](https://openairdocs.org/sdr/JYD2001F00001), Jun 20, 2001: SHAFT. CRACKED. EIGHT CRACKS FOUND IN LOWER SPLINES OF MAIN ROTOR SHAFT. MAIN GEARBOX PN 6435200400065, SN A6171 WAS REMOVED FOR OVERHAUL HAVING A TOTAL TIME OF 8857.7 AND 1430 - [SDR 20000404SH006](https://openairdocs.org/sdr/20000404SH006), Nov 4, 1999: PUMP. INOPERATIVE. UNIT WAS INOPERABLE. RETURNED TO STOCK. BENCH CHECKED BAD, WINDING SHORTED, LEAKING AROUND ELECTRICAL LEADS. REPLACED COMPLETE UNIT WITH AN EXTERNALLY MOUNTED F - [SDR CHI1791](https://openairdocs.org/sdr/CHI1791), May 23, 1997: LOCKED IN STUD. BROKE. M/R BLADE STUD BROKE (IN TENSION) DIRECTLY BELOW LOCK RING SPLINES ABOVE FIRST THREAD. REPLACED AFFECTED MAIN ROTOR BLADE WITH SERVICEABLE BLADE. - [SDR CHI1752](https://openairdocs.org/sdr/CHI1752), Mar 26, 1997: INTERMED GEARBOX. CRACKED. UPON INSPECTION IAW COLUMBIA HELICOPTERS SB 54-65-2, THE LEFT LOWER INTERMEDIATE GEARBOX MOUNT LUG WAS FOUND CRACKED. THIS WAS FOUND BY FLUORESCENT PENETRANT AN ## STCs that may be installed (OpenAirDocs) (2) Approved for this model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has. - [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 SA4302NM](https://openairdocs.org/stc/SA4302NM): Installation of Electronics Int'l digital automatic engine analyzer. Electronics International ## The same model under other registry codes Amateur-built copies and renamed makers get their own codes. - [Siller Helicopters CH-54A](https://openairdocs.org/model/siller-helicopters-ch-54a): 3 registered aircraft, registry code 8142567 - [Helicopter Transport SVC CH-54A](https://openairdocs.org/model/helicopter-transport-svc-ch-54a): 1 registered aircraft, registry code 4450002 - [Sikorsky CH-54A](https://openairdocs.org/model/sikorsky-ch-54a): 1 registered aircraft, registry code 8142501 - [Aviation International Rotors CH-54A](https://openairdocs.org/model/aviation-international-rotors-ch-54a): 1 registered aircraft, registry code 8142507 - [Evergreen Helicopters CH-54A](https://openairdocs.org/model/evergreen-helicopters-ch-54a): 1 registered aircraft, registry code 8142508 --- 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.