WINGS AND WING STRUTS
TTP
|
B1-L3
|
ATA57
|
Cessna
172
|
B2-L1
|
Wing is a strut braced type, with two main spars and suitable ribs for the attachment of the skin. Skin panels are riveted to ribs, spars and stringers to complete the structure.
All metal, piano hinged aileron, flap and detachable wing tip are mounted on each wing assembly.
Each wing also incorporates an integral fuel bay located between the two spars at the inboard portion of the wing.
Each wing is supported in position by a single lift strut which consists of a streamlined tube riveted to two end fittings for attachment at the wing and at the fuselage.
PTP
|
B1-L1
|
ATA57
|
Cessna 172
|
B2-L1
|
571001 Wing Surfaces and Tips - Inspect for skin damage, loose rivets, and condition of
paint.
571002 Wing Struts and Strut Fairings - Check for dents, cracks, loose screws and rivets, and condition of paint
571004 Wing Spar and Wing Strut Fittings - Check for evidence of wear. Check attach bolts
for indications of looseness and retorque as required.
571005 Wing Structure - Inspect spars, ribs, skins, and stringers for cracks, wrinkles, loose rivets, corrosion, or other damage.
571016 Wing structure internal. Make sure you inspect these areas: 1. Main spar upper and
lower carry-thru fittings. 2. Main spar upper and lower caps. 3. Main spar web.
571018 Wing structure external. Make sure you inspect these areas: 1. Skin with emphasis
at skin overlaps and under access panels. 2. Rear spar upper and lower caps. 3.
Rear spar web.
"wing heavy" Adjustment Procedures
paint.
571002 Wing Struts and Strut Fairings - Check for dents, cracks, loose screws and rivets, and condition of paint
571004 Wing Spar and Wing Strut Fittings - Check for evidence of wear. Check attach bolts
for indications of looseness and retorque as required.
571005 Wing Structure - Inspect spars, ribs, skins, and stringers for cracks, wrinkles, loose rivets, corrosion, or other damage.
571016 Wing structure internal. Make sure you inspect these areas: 1. Main spar upper and
lower carry-thru fittings. 2. Main spar upper and lower caps. 3. Main spar web.
571018 Wing structure external. Make sure you inspect these areas: 1. Skin with emphasis
at skin overlaps and under access panels. 2. Rear spar upper and lower caps. 3.
Rear spar web.
"wing heavy" Adjustment Procedures
(1) Remove wing fairing strip on the wing heavy side of the airplane.
CAUTION: ENSURE THE ECCENTRIC BUSHINGS ARE ROTATED SIMULTANEOUSLY.
ROTATING THEM SEPARATELY WILL DESTROY THE ALIGNMENT BETWEEN
THE OFF-CENTER BOLT HOLES IN THE BUSHINGS, THUS EXERTING A
SHEARING FORCE ON THE BOLT, WITH POSSIBLE DAMAGE TO THE HOLE IN
THE WING SPAR.
NOTE: The eccentric cams should only be adjusted after other flight control systems have been adjusted and rigged.(2) Loosen nut and rotate eccentric bushings simultaneously until the bushings are positioned with the thick side of the eccentrics up. This will lower the trailing edge of the wing, and decrease wing heaviness by increasing angle of incidence of the wing.
(3) Torque the nut from 300 to 500 inch pounds and reinstall fairing strip.
(4) Test fly the airplane. If the wing heavy condition still exists, remove fairing strip on the lighter wing, loosen nut and rotate bushing simultaneously until the bushings are positioned with the thick side of the eccentrics down. This will raise the trailing edge of the wing, thus increasing wing heaviness to balance heaviness in the opposite wing.
(5) Torque nut from 300 to 500 inch pounds, install fairing strip and repeat flight test.
CAUTION: ENSURE THE ECCENTRIC BUSHINGS ARE ROTATED SIMULTANEOUSLY.
ROTATING THEM SEPARATELY WILL DESTROY THE ALIGNMENT BETWEEN
THE OFF-CENTER BOLT HOLES IN THE BUSHINGS, THUS EXERTING A
SHEARING FORCE ON THE BOLT, WITH POSSIBLE DAMAGE TO THE HOLE IN
THE WING SPAR.
NOTE: The eccentric cams should only be adjusted after other flight control systems have been adjusted and rigged.(2) Loosen nut and rotate eccentric bushings simultaneously until the bushings are positioned with the thick side of the eccentrics up. This will lower the trailing edge of the wing, and decrease wing heaviness by increasing angle of incidence of the wing.
(3) Torque the nut from 300 to 500 inch pounds and reinstall fairing strip.
(4) Test fly the airplane. If the wing heavy condition still exists, remove fairing strip on the lighter wing, loosen nut and rotate bushing simultaneously until the bushings are positioned with the thick side of the eccentrics down. This will raise the trailing edge of the wing, thus increasing wing heaviness to balance heaviness in the opposite wing.
(5) Torque nut from 300 to 500 inch pounds, install fairing strip and repeat flight test.
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