Airworthiness Directive · Amendment 39-13822 · Hartzell Propeller Inc. (formerly Hartzell Propeller Products Division) Model HC-B5MP-3( )/M10282A( )+6 Five Bladed Propellers
Hartzell Propeller Inc. (formerly Hartzell Propeller Products Division) Model HC-B5MP-3( )/M10282A( )+6 Five Bladed Propellers
Superseded. A later AD replaced this one: AD 2006-22-12. Comply with the one in force.
This AD applies to Hartzell Propeller Inc. (formerly Hartzell Propeller Products Division) Model HC-B5MP-3()/M10282A()+6 five-bladed propellers installed on, Aerospatiale (Nord) Model 262A airplanes modified by Supplemental Type Certificate (STC) SA2369SW, and Short Brothers Ltd. Model SD3-30 airplanes.
The FAA is superseding an existing AD for certain Hartzell Propeller Inc. (formerly Hartzell Propeller Products Division) Model HC-B5MP-3( )/M10282A( )+6 five bladed propellers. That AD currently requires initial and repetitive torque check inspections on the attach bolts on certain model Hartzell HC-B5MP-3 five bladed propellers, and replacement of attach bolts if necessary. This AD requires the same inspections, but reduces compliance time for the initial inspection on certain Short Brothers Ltd. Model SD3-30 airplanes to before further flight and within 100 hours time-in-service for propellers installed on certain Aerospatiale (Nord) Model 262A airplanes. This AD also requires repetitive torque check inspections at reduced intervals on SD3-30 airplanes, and requires additional visual inspections of mounting flanges, and threads in hub bolt holes, and replacement of attach bolts and hubs, if necessary. This AD results from four reports in the last 12 months of eleven cracked or failed propeller attach bolts on Short Brothers Model SD3-30 airplanes. We are issuing this AD to prevent propeller separation from the airplane.
Before further flight, for propellers installed on Short Brothers Ltd. Model SD3-30 airplanes, do the following:
(1) Perform an initial torque check inspection of the Hartzell propeller attach bolts, P/N B-3339, unless already done within 120 hours time-in-service (TIS) before the effective date of this AD, and thereafter, within 120 hour TIS intervals since the last inspection. Use Procedure #1 “Mounting Bolt Torque Check” of Hartzell Alert Service Bulletin (ASB) A203A, dated January 5, 1995, to do the inspections.
(2) If the torque check fails, remove the propeller and go to paragraph (h) of this AD.
For propellers installed on Aerospatiale (Nord) Model 262A airplanes modified by STC SA2369SW, do the following:
(1) Perform an initial torque check inspection of the Hartzell propeller attach bolts, P/N B-3339, within 100 hours TIS after the effective date of this AD, and thereafter, within 100 hour TIS intervals since the last inspection. Use Procedure #1 “Mounting Bolt Torque Check” of Hartzell Alert Service Bulletin (ASB) A203A, dated January 5, 1995, to do the inspections.
(2) If the torque check fails, remove the propeller and go to paragraph (h) of this AD.
When the propeller is removed due to failing the torque check in Procedure #1 of Hartzell ASB A203A, dated January 5, 1995, inspect and rework if necessary, the engine and propeller mounting flange surfaces. Use Procedure #2 “Engine/Propeller Mounting Flanges” of Hartzell ASB A203A, dated January 5, 1995, to do the inspections and rework. Also inspect the hub mounting bolt holes as follows:
(1) Clean bolt holes using Stoddard solvent or equivalent and a soft bristle brush.
(2) Visually inspect the area around the bolt holes. No deformations, evidence of rework, depressions, or protrusions around bolt holes are permitted, except for an edge chamfer of the bolt hole up to 0.030 inch.
(3) Using a 10X magnification, and an appropriate light source, visually inspect threads for chipping, missing material, deformation, and scratches. No damage is permitted.
(4) Using a new P/N B-3339 bolt, check threads by threading bolt by hand into the bolt hole. The bolt must thread in easily with no binding.
(5) Any hub with a bolt hole showing one or more of the prohibited conditions specified in paragraphs (h)(2) through (h(4) must be removed from service.
(i) Before installing any Hartzell propeller attach bolt P/N B-3339, apply anti-seize compound MIL-PRF-83483, to the threaded surfaces of the attach bolt. Do not use any other anti-seize compound on attach bolts.
Before installing a Hartzell HC-B5MP-3()/M10282A()+6 propeller, the propeller mounting flange and engine flange must be clean and dry. Do not use anti-fretting compounds on the flanges. You may install an FAA-approved Pratt & Whitney shim between the propeller mount flange and engine flange.
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.
Propellers
