Airworthiness Directive · Amendment 39-18839 · Propellers/propulsors
M7 Aerospace LLC Models Airplanes
This AD applies to M7 Aerospace LLC SA226-T, SA226-AT, SA226-T(B), SA226-TC, SA227-AC (C-26A), SA227-AT, SA227-BC (C-26A), SA227-CC, SA227-DC (C-26B), and SA227-TT airplanes; all serial numbers, certificated in any category.
We are adopting a new airworthiness directive (AD) for certain M7 Aerospace LLC Models SA226-T, SA226-AT, SA226-T(B), SA226-TC, SA227- AC (C-26A), SA227-AT, SA227-BC (C-26A), SA227-CC, SA227-DC (C-26B), and SA227-TT airplanes. This AD was prompted by detachment of the power lever linkage to the TPE331 engine propeller pitch control. This AD requires repetitively inspecting the propeller pitch control for proper torque, with corrections as necessary until required replacement or rework of the PPC assembly to have a threaded hole in the splined end of the shouldered shaft and installation of a secondary retention device is done. We are issuing this AD to correct the unsafe condition on these products.
Use the applicable service bulletins as listed in paragraph (g)(1), (2), or (3) of this AD as reference to complete the actions in paragraph (i)(1) or (2) of this AD:
(1) M7 Aerospace LLC SA226 Series Service Bulletin 226-76-012, dated March 17, 2015;
(2) M7 Aerospace LLC SA227 Series Service Bulletin 227-76-007, dated March 17, 2015; or
(3) M7Aerospace LLC SA227 Series Commuter Category Service Bulletin CC7-76-004, dated March 17, 2015.
(1) Within 100 hours time-in-service (TIS) after May 5, 2017 (the effective date of this AD) and repetitively thereafter at intervals not to exceed 100 hours TIS, visually inspect the PPC lever to assure the attachment is properly installed following the applicable service information listed in paragraph (h)(1)(i), (ii), or (iii) of this AD, as applicable.
(i) For Models SA226 Series: M7 Aerospace SA226 Series Maintenance Manual Temporary Revision 71-02, dated March 15, 2016.
(ii) For Models SA227 Series: M7 Aerospace SA227 Series Maintenance Manual Temporary Revision 71-03, dated March 15, 2016.
(iii) For Models SA227 Series Commuter Category: M7 Aerospace SA227 Series Commuter Category Maintenance Manual Temporary Revision 71-02, dated March 15, 2016.
(2) The rework/replacement required by paragraph (i) of the AD and the installation of the secondary retention device required in paragraph (j) of this AD terminate the repetitive visual inspections of the PPC lever attachment required by paragraph (h)(1) of this AD.
Within the next 600 hours TIS after May 5, 2017 (the effective date of this AD) or within the next 12 months after May 5, 2017 (the effective date of this AD), whichever occurs first, do the actions in either paragraph (i)(1) or (2) of this AD following the Accomplishment Instructions in Honeywell International Inc. Service Bulletin TPE331-72-2190, dated December 21, 2011, as referenced in the applicable service information listed in paragraph (g)(1), (2), or (3) this AD.
(1) Replace the PPC. Remove the PPC assembly and replace with the applicable new design PPC using the part numbers listed in table 1 to paragraph (i)(1) of this AD.
| Part No. PPC assembly to remove | Part No. PPC assembly to install |
|---|---|
| 869130-11 | 70000295-11 |
| 869130-12 | 70000295-12 |
| 869130-13 | 70000295-13 |
| 869130-14 | 70000295-14 |
| 869130-16 | 70000295-16 |
| 869130-17 | 70000295-17 |
| 869130-18 | 70000295-18 |
| 869130-19 | 70000295-19 |
| 869130-30 | 70000295-30 |
| 895481-1 | 70000298-1 |
| 895481-2 | 70000298-2 |
| 895481-4 | 70000298-4 |
| 895481-5 | 70000298-5 |
| 895481-6 | 70000298-6 |
| 895481-7 | 70000298-7 |
| 895481-17 | 70000298-17 |
| 895481-18 | 70000298-18 |
| 895481-19 | 70000298-19 |
| 895481-20 | 70000298-20 |
| 895481-22 | 70000298-22 |
(2) Rework the PPC assembly. Inspect the splined end of the shouldered shaft for the presence and good condition of a threaded hole, repairing or replacing the cam assembly, and reworking the PPC assembly as necessary.
(1) Before further flight after the replacement or rework of the PPC assembly required in paragraph (i)(1) or (2) of this AD, install the secondary retention feature on the PPC assembly following the applicable service information listed in paragraph (j)(1)(i), (ii), or (iii) of this AD.
(i) For Models SA226 Series: M7 Aerospace SA226 Series Maintenance Manual Temporary Revision 71-02, dated March 15, 2016.
(ii) For Models SA227 Series: M7 Aerospace SA227 Series Maintenance Manual Temporary Revision 71-03, dated March 15, 2016.
(iii) For Models SA227 Series Commuter Category: M7 Aerospace SA227 Series Commuter Category Maintenance Manual Temporary Revision 71-02, dated March 15, 2016.
(2) The rework/replacement required by paragraph (i) of this AD and the installation of the secondary retention device required by paragraph (j) of this AD terminate the requirement for the repetitive inspections of the PPC lever torque required in paragraph (h) of this AD.
