AD 62-25-01

62-25-01 BOEING: Amdt. 509 Part 507 Federal Register November 21, 1962. Applies to Models 707 and 720 Series Aircraft.

Compliance with certain service bulletins pertaining to the Model 707 and Model 720 flight control systems is considered necessary to provide for significant improvement in the safety and reliability of operation of those aircraft models. Accordingly, the aircraft models listed below shall be inspected and/or modified within the compliance times and in accordance either with the service bulletins as indicated or with equivalent methods approved by the Chief, Engineering and Manufacturing Branch, FAA Western Region. Airplanes modified in accordance with later FAA approved revisions of the service bulletins listed below will be considered to have complied with the appropriate provisions of this AD.

(a) Compliance required within the next 400 hours' time in service following the effective date of this AD:

Modification Model Service Bulletin No.1. Stabilizer trim actuator auxiliary brake retaining nut. 707 & 720 984

(b) Compliance required within the next 650 hours' time in service following the effective date of this AD:

Modification Model Service Bulletin No. 1. Rudder pedal push-rod attachment. 707 337 2. Inboard aileron tab nose weight attachment screws. 707 860 3. Spoiler and emergency flap switch placard installation. 707 & 720 *1524

*BAC P/N 10-60424-621 (Type I) and P/N 10-60424-184 (Type I) are approved equivalents.

(c) Compliance required within the next 2,700 hours' time in service following the effective date of this AD:

Modification Model Service Bulletin No. 1. Bearing retainer installation for center and inboard hinges for inboard aileron tab. 707 307 (R-1) and 307 (R-1)A. 2. Guard installation for chain in stabilizer trim unit. 707 655 and 655B 3. Flap drive torque tube guard installation in wheel well area. 707 680 and 680A 4. Rudder controlinput stop modification and directional bushing replacement. 707 735 (R-1) 5. Replacement of stabilizer trim actuator. 707 & 720 889 6. Flap takeoff warning switch relocation. 707 & 720 1016 (R-1) and 1016 (R-1)C 7. Stabilizer trim actuator motor replacement. 707 1247 8. Emergency flap switch installation. 707 & 720 1251 9. Rudder power con- trol unit replacement, "Extension Sleeve Revision". 707 & 720 1479 (R-1) Part I only 10. Rudder pressure control valve bypass installation. 707 & 720 1482 (R-1). 11. Rudder control centering spring cable modification. 707 & 720 1625 12. Rudder control centering spring cable guard installation. 707 & 720 1680 & 1680A

(d) Compliance required within the next 3,500 hours time in service following the effective date of the AD.

Modification Model Service Bulletin No. 1. Inboard aileron centering spring cartridge. 707 & 720 1344 2. Control wheel stabilizer trim switch installation. 707 & 720 1410** and 1410B 3. Replacement of rudder hydraulic system solenoid valve. 707 & 720 1490 (R-1)

**BAC P/N's 10-3265-6 and 10-60705-1 are approved equivalents.

(e) Compliance required within the next 5,000 hours' time in service following the effective date of this AD:

Modification Model Service Bulletin No. 1. Stabilizer trim actuator brake unlock gear ball bearing adapter addition. 707 & 720 1128 & 1128A 2. Stabilizer trim actuator brake pawl spring. 707 & 720 1237 3. Outboard spoiler shutoff valve consolidation. 707 & 720 1336 (R-1) and 1336 (R-1)B. 4. Replacement of spoiler hydraulic system shutoff valve. 707 & 720 1484

This directive effective December 20, 1962.

Revised December 24, 1963.