Airworthiness Directive · Amendment 39-22851 · Nose/tail landing gear
DAHER (Type Certificate Previously Held by SOCATA) Airplanes
This AD applies to DAHER (type certificate previously held by SOCATA) Model MS 880B, MS 885, MS 892A-150, MS 892E-150, MS 893A, MS 893E, MS 894A, MS 894E, Rallye 100S, Rallye 150ST, Rallye 150T, Rallye 235C, and Rallye 235E airplanes, all serial numbers, certificated in any category.
The FAA is superseding Airworthiness Directive (AD) 2016-08-08 for all SOCATA (type certificate now held by DAHER) Model MS 880B, MS 885, MS 892A-150, MS 892E-150, MS 893A, MS 893E, MS 894A, MS 894E, Rallye 100S, Rallye 150ST, Rallye 150T, Rallye 235C, and Rallye 235E airplanes. AD 2016-08-08 required doing repetitive detailed visual inspections of the intersection between the axle radius and the nose landing gear (NLG) fork area for chafing; doing repetitive dye penetrant inspections on the NLG wheel axle for cracks, distortion, and nicks or wear; doing corrective actions if necessary; and replacing the NLG wheel axle attachment screws with new screws. This AD is prompted by the introduction of a new inspection method and a new design for the affected NLG wheel axle that provides terminating action for the repetitive inspections, as specified in updated service information published by the manufacturer. This AD requires preparing, inspecting, replacing, reconditioning the NLG wheel axle, and prohibiting affected parts. The FAA is issuing this AD to address the unsafe condition on these products.
For the purpose of this AD the following definitions apply:
(1) Group 1 Airplanes: Airplanes having any affected parts installed as of the effective date of this AD.
(2) Group 2 Airplanes: Airplanes that do not have any affected parts installed as of the effective date of this AD.
(3) Affected Parts: NLG wheel axles having part number (P/N) 8954200270 and NLG wheel spacer having P/N 8954200260.
(4) Serviceable Parts: NLG wheel axles having P/N AV-RAL-001-01 and NLG wheel spacer having P/N AV-RAL-002-01.
(5) New Part: Any part that has zero hours time-in-service (TIS).
(1) Within 200 hours TIS after the effective date of this AD, and thereafter at intervals not to exceed 200 hours TIS, perform a detailed visual inspection for chafing and cracking between the NLG wheel bearing and axle surface in accordance with paragraphs B.1 and B.2 of Daher Service Bulletin SB 150, Revision 4, dated January 2023 (Daher SB 150, Revision 4).
(2) If any chafing or cracking is found during any inspection required by paragraph (h)(1) of this AD, before further flight, replace the NLG wheel axle with one of the following:
(i) An NLG wheel axle that is found to be free of chafing and cracking per the inspection required by paragraph (h)(1) of this AD and free of damage per the inspection required by paragraph (h)(3) of this AD.
(ii) Serviceable parts, as defined in this AD, in accordance with paragraphs C.2 through C.4 of Daher SB 150, Revision 4. This part installation makes the airplane a Group 2 airplane and terminates the inspection requirements in this AD.
(3) If no chafing or cracking is found during any inspection required by paragraph (h)(1) of this AD, before further flight, do a magnetic particle inspection of the NLG wheel axle for damage (distortion, nicks, wear, and cracking).
(4) If any damage is found during any magnetic particle inspection required by paragraph (h)(3) of this AD, before further flight, replace the NLG wheel axle with one of the following:
(i) An NLG wheel axle that is found to be free of chafing and cracking per the inspection required by paragraph (h)(1) of this AD and free of damage per the inspection required by paragraph (h)(3) of this AD.
(ii) Serviceable parts, as defined in this AD, in accordance with paragraphs C.2 through C.4 of Daher SB 150, Revision 4. This part installation makes the airplane a Group 2 airplane and terminates the inspection requirements in this AD.
Replace the NLG wheel axle attachment screws in accordance with paragraph C.2 of Daher SB 150, Revision 4, as follows:
(1) If no screw is found to be distorted, scratched, nicked, or worn during any repetitive inspection required by paragraph (h)(1) of this AD, replace all of the NLG wheel axle attachment screws as follows:
(i) Initially before exceeding 2,000 hours TIS total on the airplane; before exceeding 2,000 hours TIS since the last time the attachment screws were replaced; or within 50 hours TIS after the effective date of this AD, whichever occurs later; and
(ii) Repetitively thereafter at intervals not to exceed 2,000 hours TIS after the last replacement.
(2) If any screw is found to be distorted, scratched, nicked, or worn during any repetitive inspection required by paragraph (h)(1) of this AD, replace that screw before further flight.
As of the effective date of this AD, do not install an affected NLG wheel axle, as defined in this AD, on any airplane, unless the criteria in paragraphs (j)(1) and (2) of this AD are met:
(1) The affected NLG wheel axle is found to be free of chafing and cracking per the inspection required by paragraph (h)(1) of this AD and free of damage per the inspection required by paragraph (h)(3) of this AD.
(2) The NLG wheel axle attachment screws are replaced with new screws.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
