Directives
Page Last Updated: 26 JUL 2010
Use the Navigation Buttons to the left for;FAA Airworthiness Directives , and older archived Service Bulletins, Technical Bulletins, and Service Letters.
Documents Issued within the last 90 days will be posted below; such as, Service Bulletins, Technical Bulletins, Service Letters and Temporary Revisions.
European Aviation Safety Agency (EASA) Links
- European Aviation Safety Agency (EASA) Home Page
- EASA List of Mandatory Continuing Airworthiness Information
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Model 900 Helicopters- Bulletins & Letters
| Size | Publication Number | Publication Title | Issue /Reissue Date |
101K |
TB900-037 | SECONDARY EJECTOR OIL BREATHER FITTING MODIFICATION
Procedures in this Bulletin provide owners and operators with instructions to modify the oil breather fitting of the secondary ejector. This technical bulletin supersedes and replaces SL900-016. |
26 JUL 2010 |
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TB900-036 | PENDING
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TB900-035 | PENDING
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55K |
SL900-072 | AIR-CONDITIONING SYSTEM MAINTENANCE
Issued to make sure the air-conditioning system is correctly maintained. |
23 JUL 2010 |
299K |
TB900-034 | THRUSTER ASSEMBLY MODIFICATION
Procedures in this Bulletin give owners and operators procedures to add bearings to the thruster buildup to reduce contact pressure against the race of the rotating cone during operation and to reduce wear of the rotating cone raceway. |
25 JUN 2010 |
249K |
TB900-033R1 | MODIFICATION OF ROOF RIB BRACKET
Procedures in this Bulletin give owners and operators information for the installation of a doubler that will reinforce the roof rib bracket, and provide a cracked bracket repair. Revised. |
25 JUN 2010 |
65K |
SL900-071 | TECHNICAL PUBLICATIONS PRICE INCREASE
MDHI has issued an advisory for price increase. |
28 MAY 2010 |
41K |
SL900-070 | HELICOPTER OPERATION IN VOLCANIC ASH ATMOSPHERE
MDHI has issued an advisory for operation in volcanic ash atmosphere. |
06 MAY 2010 |
228K |
SB900-116r1 | 300-HOUR INSPECTION FOR THE MAIN ROTOR BLADE RETENTION BOLTS
Issued to add a gap check of the main rotor blade retention bolts and to reinforce the requirements for force and torque checks, and periodic inspections. |
09 APR 2010 |
93K |
TB900-009r1 | MODIFICATION INSTRUCTIONS FOR OPTIONAL 27 AMP HOUR BATTERY
Supersedes Technical Bulletin TB900-009, dated 20 November 1998. Revised to reflect the correct part number for the Rod, Continuous Thread and other typographical errors. |
15 MAR 2010 |
Model 369D,E,FF, 500N, 600N Helicopters - Bulletins & Letters
| Size |
3 6 9 D |
3 6 9 E |
3 6 9 FF |
5 2 0 N |
6 0 0 N |
Doc. # | Title | Issue /Reissue Date |
121K  |
X | X | X | SB369D-207 SB369E-102 SB369F-087 |
INSPECTION OF SHORT EDGE MARGIN CONDITION ON 369D23500 TAILBOOM ASSEMBLY MDHI has released an inspection and repair for a short edge margin condition on 369D23500 tailbooms. |
20 JUL 2010 | ||
| 65K |
X | TB600N-009R1 |
MODIFICATION OF ENGINE CONTROL CABLE MDHI has released a modification to improve an engine control cable bracket. |
19 JUL 2010 | ||||
| 65K |
X | X | X | X | X | SL369D-120 SL369E-072 SL369F-065 SL500-020 SL600N-018 |
TECHNICAL PUBLICATIONS PRICE INCREASE MDHI has issued an advisory for a price increase |
28 MAY 2010 |
| 38K |
X | SL600N-016 |
YEARLY FUEL TRANSFER SYSTEM FUNCTIONAL CHECK MDHI has issued an advisory for an annual functional check. |
06 MAY 2010 | ||||
| 41K |
X | X | X | X | X | SL369D-119 SL369E-071 SL369F-064 SL500-019 SL600N-017 |
HELICOPTER OPERATION IN VOLCANIC ASH ATMOSPHERE MDHI has issued an advisory for operation in volcanic ash atmosphere. |
06 MAY 2010 |
| 127K |
X | X | TB500N-004 TB600N-008 |
MD VSCS TEST BOX Procedures in this bulletin give owners and operators data on how to make a VSCS test box to do an operational rigging check of the VSCS system on their helicopter. |
10 Mar 2010 | |||
| 145K | X | SB600N-050r1 |
GOVERNOR ELECTRONIC CONTROL UNIT (ECU) REPLACEMENT Rolls-Royce Corporation has made a product improvement to the Model 250 Series IV FADEC single engine control system with the addition of a Reversionary Governor to the EMC-35A ECU. |
03 MAR 2010 | ||||
| 102K |
X | X | X | X | SB369D-206 SB369E-101 SB369F-086 SB500N-043 |
INSPECTION OF P/N 369D292028, AFT PASSENGER STEP This bulletin gives instructions for a three part inspection. An initial visual inspection with 10X magnification, a proof load test with visual inspection and a dye penetrant inspection of the aft passenger step assembly welds. |
05 Feb 2010 |
Model 369H Helicopters - Bulletins & Letters
| Size | Doc. # | Title | Issue /Reissue Date |
| 65K |
SL369H-141 |
TECHNICAL PUBLICATIONS PRICE INCREASE MDHI has issued an advisory for a price increase |
28 MAY 2010 |
| 41K |
SL369H-140 |
HELICOPTER OPERATION IN VOLCANIC ASH ATMOSPHERE MDHI has issued an advisory for operation in volcanic ash atmosphere. |
06 MAY 2010 |
| 73K |
SB369H-227R1 |
INSPECTION OF LEAD-LAG LINK ATTACH NUTS Supersedes service bulletin HN-227, DN-173, EN-64 and FN-52 dated 04 September 1990. Revised to add all MD Helicopters, Inc. (MDHI) 500N and 600N series helicopters and changed to new SB format. |
06 JUL 2009 |
| 287K |
TB369H-004 |
ENGINE AUTOMATIC RE-IGNITION MODIFICATION To disconnect a defective switch in the XDS9 assembly from the system because replacement switches are not available. |
13 MAR 2009 |
| 102K |
SB369H-248R1 |
OIL COOLER BELT, ONE TIME INSPECTION MD Helicopters, Inc. has found some oil cooler belts which were not manufactured in accordance with specifications. When in operation, these belts may track incorrectly and could result in damage to the belt and surrounding components. |
13 MAR 2009 |
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