Airworthiness directives › 2021-24-04
AD 2021-24-04 Airworthiness Directives; Bell Textron Canada Limited (Type Certificate Previously Held by Bell Helicopter Textron Canada Limited) Helicopters
Models named: 505. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Bell Helicopter Textron Canada Limited (type certificate previously held by Bell Helicopter Textron Canada Limited) Model 505 helicopters having serial number 65011 and subsequent, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 30 calendar days after the effective date of this AD, revise the Limitations Section of the existing Rotorcraft Flight Manual (RFM) for your helicopter by replacing Figure 1-6. with Figure 1-6. Fuel Operating Envelope (Sheet 1 of 1) of Bell 505 Rotorcraft Flight Manual BHT-505-FM-1, Revision 3, dated July 25, 2018 (BHT-505-FM-1 Revision 3). Using a different document with information identical to that in Figure 1-6. Fuel Operating Envelope (Sheet 1 of 1) of BHT-505-FM-1 Revision 3 is acceptable for compliance with the requirements of this AD. The action required by this paragraph may be performed by the owner/operator (pilot) holding at least a private pilot certificate and must be entered into the aircraft records showing compliance with this AD in accordance with 14 CFR 43.9(a)(1) through (4) and 14 CFR 91.417(a)(2)(v). The record must be maintained as required by 14 CFR 91.417, 121.380, or 135.439.
Unsafe condition
This AD was prompted by the determination that reducing the pressure altitude limitations for certain fuel types is necessary. The FAA is issuing this AD to address unsatisfactory flight performance of the engine above pressure altitude limitations for Jet B and JP-4 fuels. The unsafe condition, if not addressed, could result in low fuel pressure, engine flame-out, or engine power interruption.
Affected ADs
None.
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