As of March 23, 1999
As of March 23, 1999
| NUMBER |
RECOMMENDATION |
STATUS |
|
A-91-77 |
Galling of Standby Rudder Actuator Bearings |
CLOSED -- ACCEPTABLE ALT |
| A-92-118 | Develop test to verify proper operation of PCU valve | CLOSED -- ACCEPTABLE ALT |
| A-92-119 | Develop preflight check to verify proper rudder operation | CLOSED -- ACCEPTABLE ALT |
| A-92-120 | Require operators to incorporate PCU design changes | CLOSED -- ACCEPTABLE |
| A-92-121 | Conduct design review of Parker Hannefin servo valves | CLOSED -- ACCEPTABLE |
| A-92-57 | Develop meteorological program for Colorado Springs | OPEN -- ACCEPTABLE |
| A-92-58 | Develop broader meteorological program | OPEN -- UNACCEPTABLE |
| A-95-25 | Expedite FDR flight control parameter retrofit for B-737s | CLOSED -- UNACCEPTABLE |
| A-95-26 | Upgrade FDR parameters for other transport aircraft | CLOSED -- UNACCEPTABLE |
| A-95-27 | Upgrade FDR parameters for newly manufactured aircraft | CLOSED -- UNACCEPTABLE |
| A-96-107 | Develop operational measures and long term design changes to preclude potential for loss of control from rudder hardover | OPEN -- UNACCEPTABLE |
| A-96-108 | Revise CFRs to account for flight control failure at design limits. | OPEN -- AWAIT RESPONSE |
| A-96-109 | Require Boeing to install cockpit indicator system | OPEN -- UNACCEPTABLE |
| A-96-110 | Review yaw damper and redesign as necessary | OPEN -- ACCEPTABLE |
| A-96-111 | Eliminate PCU removal procedure from B737 maintenance manual | CLOSED -- ACCEPTABLE |
| A-96-112 | Establish inspection intervals and life-limit for B-737 PCU | OPEN -- UNACCEPTABLE |
| A-96-113 | Devise method to detect jammed PCU slide | OPEN -- UNACCEPTABLE |
| A-96-114 | Evaluate chip shearing capacity of sliding spool valves | OPEN -- ACCEPTABLE |
| A-96-115 | Modify input rod bearing on B737 standby rudder actuato | CLOSED -- ACCEPTABLE |
| A-96-116 | Implement standards for hydraulic fluid cleanlines | CLOSED -- ACCEPTABLE |
| A-96-117 | Conduct design review on dual-concentric servo valves | OPEN -- ACCEPTABLE |
| A-96-118 | Develop procedures to disengage yaw damper in upset | OPEN -- UNACCEPTABLE |
| A-96-119 | Develop operational procedures for uncommanded rudder hardover | CLOSED -- ACCEPTABLE |
| A-96-120 | Require unusual attitude training | OPEN -- ACCEPTABLE |
| A-97-16 | Require installation of redesigned rudder PCU | CLOSED -- ACCEPTABLE |
| A-97-17 | Advise pilots of hazards of jammed valve with full rudder input | CLOSED -- ACCEPTABLE |
| A-97-18 | Develop procedures & training to deal with sudden rudder hardover | OPEN -- UNACCEPTABLE |
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