Airworthiness directives › 2021-05-22
AD 2021-05-22 Airworthiness Directives; Safran Helicopter Engines, S.A. (Type Certificate Previously Held by Turbomeca, S.A.), Turboshaft Engines
Applicability*9
This AD applies to Safran Helicopter Engines (Type Certificate previously held by Turbomeca, S.A.): (1) Arriel 1B, Arriel 1C, Arriel 1C2, and Arriel 1D1 model turboshaft engines with a Stage 2 HPT disk part number (P/N) 0292250400 and serial number (S/N) J915AD, J918AD, J919AD, J921AD, J923AD, J924AD, J926AD or J927AD, installed; and (2) Astazou XIV B and Astazou XIV H model turboshaft engines with a Stage 3 turbine wheel P/N 0256257050 and S/N J276AD, J278AD, J279AD, J281AD, J282AD, J283AD or J287AD, installed.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) For affected Safran Helicopter Engines Arriel 1B, Arriel 1C, Arriel 1C2 and Arriel 1D1 model turboshaft engines, within 25 flight hours (FHs) after the effective date of this AD, remove from service the Stage 2 HPT disk and replace with a part that is eligible for installation. (2) For affected Safran Helicopter Engines Astazou XIV B and Astazou XIV H model turboshaft engines, within 25 FHs after the effective date of this AD, remove from service the Stage 3 turbine wheel and replace with a part that is eligible for installation.
Unsafe condition
This AD was prompted by the detection of positive segregation (freckles) on Stage 2 high-pressure turbine (HPT) disks and Stage 3 turbine wheels manufactured from a certain block of material. The FAA is issuing this AD to prevent failure of the HPT disk. The unsafe condition, if not addressed, could result in failure of the Stage 2 HPT disk and Stage 3 turbine wheels, uncontained release of these parts, damage to the helicopter, and reduced control of the helicopter.
Affected ADs
None.
Read the original on the Federal Register →
You just looked this one up by hand
TrackAD holds all 12,278 of them and matches them against the aircraft you actually look after — airframe, engine, propeller and appliances in one pass — then works out what falls due and when.
- Bring your existing list in from a spreadsheet Paste the rows straight out of Excel. Headers like C/W Date and N/A are read for you.
- A copy that works when this does not One file. No internet, no login, no this software running. For the morning something has to be produced and the computer is not cooperating.
- $5 a month, or $50 a year Up to 50 aircraft on either.
Look round a real shop first Start free
The demonstration shop is eleven real aircraft with a year of work behind them. No account needed.
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