R44 SERVICE BULLETIN SB-95
ROBINSON R44 CLIPPER II · Service Bulletins
Overview
This service bulletin outlines the necessary upgrades for the main gearbox of R44-series helicopters to improve corrosion resistance. It specifies compliance timelines and procedures for affected gearboxes, ensuring safety and reliability in operation.
- Applies to R44-series helicopters with specific gearbox models.
- Affected gearboxes must be upgraded or exchanged by January 31, 2020.
- Older gearboxes are more susceptible to corrosion.
- Upgrades improve gearbox corrosion resistance.
- Cost for modification is approximately $10,500.
- Significant corrosion may require gearbox overhaul.
- Maintenance records must be updated after compliance.
- FAA approved compliance with federal regulations.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Reference only, not for flight. Use the current approved manual for your aircraft. See terms, section 5.
Document
Source
Copy found at helico-russia.ru. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type ·
- Service Bulletins
- Year ·
- 2017
- File size ·
- 147 KB
- Copy found at ·
- helico-russia.ru
- Language ·
- en
What is the R44 SERVICE BULLETIN SB-95?
The R44 SERVICE BULLETIN SB-95 is a service bulletins for the ROBINSON R44 CLIPPER II, dated 2017.
What year was the R44 SERVICE BULLETIN SB-95 published?
The R44 SERVICE BULLETIN SB-95 — the ROBINSON R44 CLIPPER II service bulletins on file — is dated 2017.
Common. One of the most common aircraft types we track.
Most owners only have the POH. Here's the essential set for the ROBINSON R44 CLIPPER II.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins on file
- Type Certificate (TCDS)
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In this document
Affected Rotorcraft
R44-series helicopters equipped with C006-3 or -5 main gearboxes without B900-9 modification are affected.
Time of Compliance
Compliance is required when the gearbox reaches 12 years since new or by January 31, 2020, whichever is later.
Background
Earlier gearbox revisions are more prone to corrosion, necessitating upgrades to newer designs.
Compliance Procedure
Determine gearbox status, return affected gearboxes for upgrade or overhaul, and update maintenance records.
Approximate Cost
Modification costs around $10,500, with additional charges for unserviceable parts.
FAA Compliance
The design aspects of this bulletin comply with applicable FAA regulations.
Summary written by AI from the source document. Check the original before relying on it. See which parts of Sprinkle are written by AI.
Full document text
Page 1 of 1 R44 SERVICE BULLETIN SB-95 DATE: 20 December 2017 TO: R44-series Owners, Operators, and Maintenance Personnel SUBJECT: Main Gearbox Upgrades ROTORCRAFT AFFECTED: R44-series helicopters equipped with C006-3 or -5 main gearboxes which do not have B900-9 gearbox modification. Spare C006-3, -4, -5, or -6 gearboxes which do not have B900-9 modification are also affected. Note: C006-7 & -8 main gearboxes are not affected by this bulletin. R44 S/N 2409 & subsequent, R44 II S/N 13839 & subsequent, and all R44 Cadets were originally equipped with C006-7 gearboxes. TIME OF COMPLIANCE: When gearbox reaches 12 years since new or since overhaul or by 31 January 2020, whichever occurs later. “12 years” means twelve years from date of factory-issued helicopter airworthiness certificate or factory-issued release certificate (FAA Form 8130-3, Airworthiness Approval Tag). Calendar service time accumulates whether or not gearbox is installed in a helicopter. BACKGROUND: Earlier-revision main gearbox gear carriers are more susceptible to corrosion, which may lead to failure of the carrier. Later revision gearboxes incorporate design changes which improve corrosion resistance. This bulletin requires earlier gearboxes be returned to RHC for upgrade or exchange to the corrosion-resistant design. COMPLIANCE PROCEDURE: 1. Determine gearbox part number and modification status; modification is indicated by a data plate near sight gage. For C006-7 or -8 gearboxes or for gearboxes with B900-9 modification plate, no further action is required; proceed to step 3. 2. If gearbox is affected, return to RHC by specified compliance time. Depending on condition, gearbox will be upgraded and identified with a B900-9 modification plate adjacent to the C006 data plate, or gearbox will be overhauled and re-identified as a C006-7 or -8 gearbox. Note: Significant internal corrosion will require gearbox overhaul. 3. Make appropriate maintenance record entries. APPROXIMATE COST: $10,500 for B900-9 modification. Possible additional charge if parts are found unserviceable. Allow four weeks at the factory. $25,100 for C006-7R overhauled-exhange main gearbox, plus $8600 core deposit. Immediate availability typical. THE DESIGN ENGINEERING ASPECTS OF THIS BULLETIN HAVE BEEN SHOWN TO COMPLY WITH APPLICABLE FEDERAL AVIATION REGULATIONS AND ARE FAA APPROVED.