Airworthiness directives › 2021-11-01
AD 2021-11-01 Airworthiness Directives; Bell Textron Canada Limited Helicopters
Models named: 206B. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to the following Bell Textron Canada Limited (Bell) helicopters, certificated in any category: (1) Bell Model 206B, serial number (S/N) 004 through 4690 inclusive, including helicopters converted from Model 206A; and Note 1 to paragraph (c)(1): Helicopters with a 206B3 designation are Model 206B helicopters. (2) Bell Model 206L, S/N 45001 through 45153 inclusive, and 46601 through 46617 inclusive.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 25 hours time-in-service after the effective date of this AD: (1) For Bell Model 206B helicopters: (i) Revise the existing Rotorcraft Flight Manual (RFM) for your helicopter by inserting Section 1, Operating Limitations, page 1-2A, of Bell Model 206B RFM BHT-206B-FM-1, Revision B-54, dated May 30, 2018 (BHT-206B-FM-1) or Section 1, Limitations, page 1-5, of Bell Model 206B3 RFM BHT-206B3-FM-1, Revision 17, dated May 30, 2018 (BHT-206B3-FM-1), as applicable to your helicopter. Inserting a different document with “Steady-state operation” information identical to page 1-2A of BHT-206B-FM-1 or page 1-5 of BHT-206B3-FM-1, as applicable to your helicopter, is acceptable for compliance with the requirements of this paragraph. (ii) Revise the existing RFM for your helicopter by inserting Section 2, Normal Procedures, page 2-8 of BHT-206B-FM-1 or Section 2, Normal Procedures, page 2-10 of BHT-206B3-FM-1, as applicable to your helicopter. Inserting a different document with “Continuous Operation” information identical to page 2-8 of BHT-206B-FM-1 or page 2-10 of BHT-206B3-FM-1, as applicable to your helicopter, is acceptable for compliance with the requirements of this paragraph. (iii) Remove placard part number (P/N) 230-075-213-121, if installed. (iv) Install placard P/N 230-075-213-129 or placard P/N 230-075-213-131 on the instrument panel directly below the dual tachometer. (2) For Bell Model 206L helicopters: (i) Revise the existing RFM for your helicopter by inserting Section 1, Operating Limitations, page 1-4B, of Bell Model 206L RFM BHT-206L-FM-1, Revision 31, dated May 30, 2018 (BHT-206L-FM-1). Inserting a different document with “Steady-state operation” information identical to page 1-4B of BHT-206L-FM-1 is acceptable for compliance with the requirements of this paragraph. (ii) Revise the existing RFM for your helicopter by inserting Section 2, Normal Procedures, page 2-10 of BHT-206L-FM-1. Inserting a different document with “Continuous Operation” information identical to page 2-10 of BHT-206L-FM-1 is acceptable for compliance with the requirements of this paragraph. (iii) Remove placard P/N 230-075-213-123, if installed. (iv) Install placard P/N 230-075-213-129 or placard P/N 230-075-213-131 on the instrument panel below the dual tachometer.
Unsafe condition
This AD defines the unsafe condition as a third stage turbine vibration. This condition could result in turbine failure, engine power loss, and subsequent loss of control of the helicopter.
Affected ADs
This AD replaces AD 2013-20-13, Amendment 39-17619 (78 FR 66252, November 5, 2013).
Read the original on the Federal Register →
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1