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Airworthiness Directive

AD 99-09-05 64 FR 19254 Active

Federal Aviation Administration · 14 CFR part 39

Requires initial and repetitive visual inspections and verification of the torque of the bolts on the main rotor hub.

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FR document
99-9825
Amendment
39-11137
Published
1999-04-20
Effective
1999-05-05
Models covered
1

Last live check: 2026-08-19

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AD

99-09-05

FR doc 99-9825 · 64 FR 19254

AD 99-09-05Published 1999-04-20Effective 1999-05-05

FAA rule - 14 CFR 39

FAA rule. Compliance with an applicable AD is required under 14 CFR 39.7. Check its effective date, applicability, compliance times and current status.

Requires initial and repetitive visual inspections and verification of the torque of the bolts on the main rotor hub.

Full official abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to BHTC Model 230 helicopters. This action requires initial and repetitive visual inspections and verification of the torque of the bolts on the main rotor hub. This amendment is prompted by a report of fatigue cracks around the bolt holes of the main rotor pitch horn (pitch horn) and a cracked main rotor flapping bearing assembly (flapping bearing assembly) on a similar model helicopter. This condition, if not corrected, could result in fretting-induced fatigue cracking of the flapping bearing assembly and around the bolt holes of the pitch horn, loss of the rotor system, and subsequent loss of control of the helicopter.

More directives for Bell 230

  1. AD 2021-19-01 Airworthiness Directives; Bell Textron Canada Limited Helicopters Effective 2021-10-13
  2. AD 2016-08-17 Airworthiness Directives; Bell Helicopter Textron Canada Helicopters Effective 2016-05-31
  3. AD 2013-20-02 Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) ... Effective 2013-12-05
  4. AD 2013-18-06 Airworthiness Directives; Bell Helicopter Textron Canada Limited (Bell) ... Effective 2013-10-17
  5. AD 2010-26-51 Airworthiness Directives; Bell Helicopter Textron Canada Limited (BHTC) ... Effective 2011-03-25

All Bell 230 directives

View on Federal Register (opens in a new tab) View this AD in FAA DRS (opens in a new tab) Print AD packet (opens the full Federal Register document in a new tab)

Applies to 1 model in our index