Commonwealth legislation

AD/PW-P/12 - Operating Restrictions - Placarding

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This directive immediately requires Douglas DC‑4s with Pratt & Whitney R2000 engines and Hamilton Standard 23E50/6507‑0 propellers to avoid steady operation in specified r.p.m. bands when propeller blades are off the low‑pitch stops, and to mark the r.p.m. indicator with a red sector and replace existing placards to reflect the new limits. It affects operators, pilots, and maintenance/ground crews, who must change operating practices and fit new placards at their own cost to remain compliant.

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AD/PW-P/12 - Operating Restrictions - Placarding

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Pratt and Whitney Piston Engines

AD/PW-P/12 Operating Restrictions - Placarding NK

Applicability: R2000 series installed in Douglas DC4 aeroplanes and fitted with Hamilton Standard 23E50/6507-0 propellers.

Requirement: 1. Avoid steady operation of the engines in the ranges 1550 to 1750 r.p.m. in flight and 1550 to 1800 r.p.m. during ground running when the propeller blades are off the low pitch stops.

2. The R.P.M. indicators in aeroplanes affected shall be marked with a suitable red sector over the 1550 to 1750 r.p.m. range.

3. Remove the existing placard covering the 1600 to 1700 r.p.m. range and install a new placard setting out the restrictions specified in paragraph 1.

Note: If desired the placard required by paragraph 3 may incorporate the limitation on the 2310 to 2510 r.p.m. range required by ANO AD/PW-P/8.

or FAA AD 62-26-1.

Compliance: Forthwith.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

1 AD/PW-P/12 - Operating Restrictions - Placarding