Document ID: chunk:federal_register_of_legislation:F2021C01280:reg:5:p14
Version: federal_register_of_legislation:F2021C01280
Segment Type: reg
Provision Reference: reg 5 (pt 14/26)
Character Range: 40648–43484

the fuel added to the fuel tank; or
(B) a dip or drip stick previously calibrated for the fuel tank;
(h) during the test, the motion of any fuel quantity gauge must be smooth and continuous.
       6.4Determination of the accuracy of the system must be performed:
(a) at intervals not exceeding every 48 months; and
(b) if any system component or system interwiring is changed or modified — at the same time as the change or modification, and then after that at intervals not exceeding every 48 months.

7 Propeller systems

Application
       7.1 This clause applies to an aircraft's fixed-pitch wooden or composite propellers.

Checks
       7.2 Within the intervals mentioned in subclause 7.3, the following checks must be performed:
(a) all propeller attachment bolts and hub retaining nuts must be checked to ensure they have the appropriate torque;
(b) the propeller track must be checked to ensure that the blades are rotating in the same plane of rotation;
(c) the propeller hubs and blades, including their surface finish, must be checked for breaks, scores, nicks, cracks, delamination, corrosion, and the security of the leading edge sheath, to confirm the continuing airworthiness of the propeller.
Note   Where AMD for a specific propeller system is not available, the inspection, maintenance and field repair methods contained in FAA AC 20-37E, or subsequent revisions, should be used.
       7.3 Each check mentioned in subclause 7.2 must be carried out as follows:
(a) after the first flight following a propeller fitment;
(b) when there has been significant change in the average ambient humidity, due to a seasonal change or a change in aircraft locality;
(c) before a first flight after the aircraft has been idle for an extended period.

Intervals
       7.4Each check mentioned in subclause 7.2 must be carried out at intervals not exceeding whichever of the following happens first:
(a) every 110 hours in service, or every 110 hours in service after a check for an event mentioned in paragraph 7.3 (a), (b) or (c);
(b) every 12 months after manufacture, or every 12 months after a check for an event mentioned in paragraph 7.3 (a), (b) or (c).

8 Feathering propellers — functional check

Application
       8.1 This clause applies to a piston engine aircraft fitted with 1 or more feathering propellers, other than a powered glider.

Checks
       8.2 Within the intervals mentioned in subclause 8.3, the aircraft feathering propeller must be given a ground functional check in accordance with the manufacturer's procedures and instructions for feathering and unfeathering the propeller to ensure that the propeller fully feathers within the time limits specified by the aircraft manufacturer.

Intervals
       8.3 The check mentioned in subclause 8.2 must be carried out at intervals not exceeding whichever of