Airworthiness directives › 2021-22-08
AD 2021-22-08 Airworthiness Directives; Hélicoptères Guimbal Helicopters
Makes named: guimbal. Models named: Cabri G2. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Hélicoptères Guimbal (HG) Model Cabri G2 helicopters, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Before further flight after the effective date of this AD, remove from service any part that has reached or exceeded its life limit, as specified in paragraphs (g)(1)(i) through (iii) of this AD, and thereafter remove from service any part on or before each part reaches its life limit: (i) The life limit for cooling fan front flange part number (P/N) G52-02-200 mounted on pulley (12 screws) P/N G52-10-100 or G52-10-101; and cooling fan front flange P/N G52-02-201 mounted or having been mounted on pulley (12 screws) P/N G52-10-100 or G52-10-101, installed on cooling fan P/N G52-00-001 or G52-00-002; is 2,200 total hours time-in-service (TIS). (ii) The life limit for cooling fan front flange P/N G52-02-201 mounted on pulley (24 screws) P/N G52-10-102 and having never been mounted on pulley (12 screws) P/N G52-10-100 or G52-10-101, installed on cooling fan P/N G52-00-001 or G52-00-002, is 4,400 total hours TIS. (iii) The life limit for engine pulley ball bearing P/N HG61-0790 and HG61-1944, installed on engine pulley assembly P/N G51-14-1XX, is 2,200 total hours TIS. (2) Perform the following CMR tasks as follows: (i) Cooling fan front flange P/N G52-02-200 mounted on pulley (12 screws) P/N G52-10-100 or G52-10-101; and cooling fan front flange P/N G52-02-201 mounted or having been mounted on pulley (12 screws) P/N G52-10-100 or G52-10-101, installed on cooling fan P/N G52-00-001, and with 500 or more total hours TIS since new as of the effective date of this AD: Within 5 hours TIS after the effective date of this AD and thereafter at intervals not to exceed 50 hours TIS, or 70 engine start-stop cycles, whichever occurs first, inspect the cooling fan front flange for a crack in accordance with Section E, Maintenance Instructions, sub section 52-A-10 Cooling Fan Inspection, paragraph c), on page E-5-53, of Guimbal France Hélicoptères Guimbal Cabri G2 Maintenance Manual (MM) and Instructions for Continued Airworthiness, J70-002—Issue 06, dated December 6, 2018 (MM J70-002 Issue 06), except where MM J70-002 Issue 06 specifies to use a torchlight, use a flashlight. If any crack is found, before further flight, remove the cooling fan front flange from service. (ii) Cooling fan front flange P/N G52-02-200 mounted on pulley (12 screws) P/N G52-10-100 or G52-10-101; and cooling fan front flange P/N G52-02-201 mounted or having been mounted on pulley (12 screws) P/N G52-10-100 or G52-10-101, installed on cooling fan P/N G52-00-001, and with less than 500 total hours TIS since new as of the effective date of this AD: Before accumulating 500 total hours TIS since new and thereafter at intervals not to exceed 50 hours TIS, or 70 engine start-stop cycles, whichever occurs first, inspect the cooling fan front flange for a crack in accordance with Section E, Maintenance Instructions, sub section 52-A-10 Cooling Fan Inspection, paragraph c), on page E-5-53, of MM J70-002 Issue 06, except where MM J70-002 Issue 06 specifies to use a torchlight, use a flashlight. If any crack is found, before further flight, remove the cooling fan front flange from service. (iii) Cooling fan front flange P/N G52-02-201 mounted on pulley (24 screws) P/N G52-10-102 and having never been mounted on pulley (12 screws) P/N G52-10-100 or G52-10-101, installed on cooling fan P/N G52-00-002: Before accumulating 500 total hours TIS since new and thereafter at intervals not to exceed 100 hours TIS, inspect the cooling fan front flange for a crack in accordance with Section E, Maintenance Instructions, sub section 52-A-10 Cooling Fan Inspection, paragraph c), on page E-5-53, of MM J70-002 Issue 06, except where MM J70-002 Issue 06 specifies to use a torchlight, use a flashlight. If any crack is found, before further flight, remove the cooling fan front flange from service. (iv) For helicopters with tail boom P/N G65-00-101, G65-00-102 or G65-00-103 and subsequent installed: Before further flight after the effective date of this AD, paint or verify the tail boom upper surface in accordance with Section C, Airworthiness Limitations, sub section C-23 Tail Structure Paint, on page C-6, of MM J70-002 Issue 06, as applicable to your helicopter.
Unsafe condition
This AD was prompted by a notification of certain parts remaining in service beyond their fatigue life or beyond maintenance intervals required by the certification maintenance requirements (CMRs) of the Instructions for Continued Airworthiness. The FAA is issuing this AD to prevent failure of a part, which could result in loss of control of the helicopter.
Affected ADs
None.
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