Airworthiness Directive · Amendment 39-15303 · Thrush Aircraft, Inc. Model S2R Series Airplanes
Thrush Aircraft, Inc. Model S2R Series Airplanes
This AD applies to the following airplane models and serial numbers that are certificated in any category and are equipped with metal empennage part numbers (P/N) 40220 or 95400 (applies to serial numbers with or without a “DC” suffix):
| Model | Serial Nos. |
|---|---|
| (1) S2R | 1416R through 5100R. |
| (2) S2R-R1340 | R1340-001 through R1340-035. |
| (3) S2R-R1820 | R1820-001 through R1820-036. |
| (4) S2R-T11 | T11-001 through T11-005. |
| (5) S2R-T15 | T15-001 through T15-044 and T27-001 through T27-044. |
| (6) S2R-T34 | 6000 through 6049, T34-001 through T34-279, T36-001 through T36-279, T41-001 through T41-279, and T42-001 through T42-279. |
| (7) S2RHG-T34 | T34HG-101 through T34HG-107. |
| (8) S2R-T45 | T45-001 through T45-015. |
| (9) S2R-T65 | T65-001 through T65-018. |
| (10) S2RHG-T65 | T65-001 through T65-018 and T65HG-011 through T65HG-019. |
| (11) S2R-G1 | G1-101 through G1-115. |
| (12) S2R-G5 | G5-101 through G5-105. |
| (13) S2R-G6 | G6-101 through G6-155. |
| (14) S2R-G10 | G10-101 through G10-168. |
| (15) S2R-T660 | T660-101 through T660-120. |
We are adopting a new airworthiness directive (AD) for certain Thrush Aircraft, Inc. (Thrush) Model S2R series airplanes. This AD requires you to do repetitive visual inspections of the vertical and horizontal stabilizer attach fitting, attach fitting bolts, and the vertical fin aft spar for cracks or corrosion. This AD also requires immediate replacement of the vertical and horizontal stabilizer attach fittings and attach fitting bolts if cracked or corroded parts are found, and the inspection of the vertical fin aft spar with repair or replacement if cracks or corrosion are found. This AD requires the eventual replacement of the vertical and horizontal stabilizer attach fittings and attach fitting bolts if no corrosion or cracks are found as terminating action for the repetitive inspections. This AD results from reports of cracks in the empennage of Thrush S2R series airplanes. We are issuing this AD to detect and correct these cracks, which could cause the vertical stabilizer to lose structural integrity. This failure could lead to loss of control.
To address this problem, you must do the following, unless already done:
| Actions | Compliance | Procedures |
|---|---|---|
| (1) Perform a visual inspection of the vertical stabilizer attach fitting (P/N 40301-7), the horizontal stabilizer attach fitting (P/N 40303-1/-4/-7 or 95267-1), attachment bolt (P/N NAS1105-68), and the vertical fin aft spar (P/N 40261-24 or P/N 95253-1) for corrosion and cracks | Within the next 50 hours time-in-service (TIS) after January 22, 2008 (the effective date of this AD) and repetitively thereafter at intervals not to exceed 100 hours TIS | Follow Thrush Aircraft, Inc. Service Bulletin No. SB-AG-45, Revision B, dated June 1, 2007. |
| (2) If corrosion or cracks are found in P/N 40301-7, 40303-1/-4/-7, 95267-1, NAS1105-68, 40261-24, or 95253-1 during any inspection required in paragraph (e)(1) of this AD: (i) Replace the vertical stabilizer attach fitting with new P/N 95266-3; the horizontal stabilizer attach fitting with new P/N 95267-5; and the attachment bolt with NAS6207-68; and (ii) If corrosion or cracks are found in the P/N 40261-24 or P/N 95253-1 vertical fin aft spar, repair in accordance with Thrush SB-AG-45, Revision B, or replace with a new P/N 40261-24 or new P/N 95253-1 | Before further flight after any inspection where corrosion or cracks are found. This action terminates the repetitive inspections required in paragraph (e)(1) of this AD | Follow Thrush Aircraft, Inc. Service Bulletin No. SB-AG-45, Revision B, dated June 1, 2007. |
| (3) If no corrosion or cracks are found in P/N 40301-7, 40303-1/-4/-7, 95267-1, NAS1105-68, 40261-24, or 95253-1 during any inspection required in paragraph (e)(1) of this AD: (i) Replace the vertical stabilizer attach fitting with new P/N 95266-3; the horizontal stabilizer attach fitting with new P/N 95267-5; and the attachment bolt with NAS6207-68; and (ii) Perform a visual inspection of the vertical fin aft spar (P/N 40261-24 or P/N 95253-1) for corrosion and cracks, and (iii) If corrosion or cracks are found in the P/N 40261-24 or P/N 95253-1 vertical fin aft spar, repair in accordance with Thrush SB-AG-45, Revision B, or replace with a new P/N 40261-24 or new P/N 95253-1 | Within the next 2,000 hours TIS after January 22, 2008 (the effective date of this AD) or within 2 years after January 22, 2008 (the effective date of this AD), whichever occurs first. This action terminates the repetitive inspections required in paragraph (e)(1) of this AD | Follow Thrush Aircraft, Inc. Service Bulletin No. SB-AG-45, Revision B, dated June 1, 2007. |
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.
