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A crj-700 in climb at FL230 with autoplt engaged roll to left and then corrected. Passing FL270 again rolled to left. Autoplt disengaged. All system checked normal.
| Attributes | |
| ACN | 645209 |
| Time | |
| Date | 200501 |
| Place | |
| Locale Reference | intersection : shero |
| State Reference | TX |
| Altitude | msl single value : 23000 |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw.artcc tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet 700 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 645209 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 645213 |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : overcame equipment problem flight crew : overrode automation |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Climb out from dfw; passing FL230; aircraft yawed to the left and then corrected back on its own. Passing FL270; aircraft rolled to the left. First officer; flying; disconnected autoplt; returned to course. We checked FMS; hydraulic page; flight control page; and all normal. Landed ZZZ mdc page normal. Made write-up. Supplemental information from acn 645213: controls went back to neutral; no abnormal feel. Rechked all system again; looked normal; so re-engaged autoplt and continued on. No further occurrence in-flight. Callback conversation with reporter acn 645209 revealed the following information: the reporter said with the autoplt engaged the aircraft made 2 uncommanded left rolls and both times corrected. Autoplt was disconnected and a check of the FMS hydraulic page and flight control page indicated all normal. No information regarding the corrective action was received from maintenance. Callback conversation with reporter acn 645213 revealed the following information: reporter said he received no information on fix from maintenance but did not follow up.
Original NASA ASRS Text
Title: A CRJ-700 IN CLB AT FL230 WITH AUTOPLT ENGAGED ROLL TO L AND THEN CORRECTED. PASSING FL270 AGAIN ROLLED TO L. AUTOPLT DISENGAGED. ALL SYS CHKED NORMAL.
Narrative: CLBOUT FROM DFW; PASSING FL230; ACFT YAWED TO THE L AND THEN CORRECTED BACK ON ITS OWN. PASSING FL270; ACFT ROLLED TO THE L. FO; FLYING; DISCONNECTED AUTOPLT; RETURNED TO COURSE. WE CHKED FMS; HYD PAGE; FLT CTL PAGE; AND ALL NORMAL. LANDED ZZZ MDC PAGE NORMAL. MADE WRITE-UP. SUPPLEMENTAL INFO FROM ACN 645213: CTLS WENT BACK TO NEUTRAL; NO ABNORMAL FEEL. RECHKED ALL SYS AGAIN; LOOKED NORMAL; SO RE-ENGAGED AUTOPLT AND CONTINUED ON. NO FURTHER OCCURRENCE INFLT. CALLBACK CONVERSATION WITH RPTR ACN 645209 REVEALED THE FOLLOWING INFO: THE RPTR SAID WITH THE AUTOPLT ENGAGED THE ACFT MADE 2 UNCOMMANDED L ROLLS AND BOTH TIMES CORRECTED. AUTOPLT WAS DISCONNECTED AND A CHK OF THE FMS HYD PAGE AND FLT CTL PAGE INDICATED ALL NORMAL. NO INFO REGARDING THE CORRECTIVE ACTION WAS RECEIVED FROM MAINT. CALLBACK CONVERSATION WITH RPTR ACN 645213 REVEALED THE FOLLOWING INFO: RPTR SAID HE RECEIVED NO INFO ON FIX FROM MAINT BUT DID NOT FOLLOW UP.
Data retrieved from NASA's ASRS site as of January 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.