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An MD80 technician reports finding 13TH stage and 8TH stage pneumatic xfeed ducting at station 1380 and anti-ice duct coupling chaffing.
| Attributes | |
| ACN | 565594 |
| Time | |
| Date | 200211 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tower : teb.tower |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : fcc technician : powerplant technician : airframe |
| Experience | maintenance avionics : 6 maintenance technician : 28 |
| ASRS Report | 565549 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure non adherence : far |
| Independent Detector | other other : person 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : work cards performance deficiency : installation performance deficiency : non compliance with legal requirements performance deficiency : scheduled maintenance |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
Narrative:
Aircraft X MD80 aircraft. Problem: l-hand pneumatic xfeed duct chaffing at station 1380 and at coupling of wing/tail anti-ice duct in aft accessory of MD80. Checked other MD80's and found spacing between ducts greater than 1 inch, and between duct and station 1380 greater than 5/8 inch. Operating temperature and pressure of xfeed duct is 450-490 degrees F and 80 psi which could cause airframe damage to station 1380 if duct should chaff through duct wall. Chaffing could also cause a fire in aft accessory compartment. Discrepancy written on 'a' check card.
Original NASA ASRS Text
Title: AN MD80 TECHNICIAN RPTS FINDING 13TH STAGE AND 8TH STAGE PNEUMATIC XFEED DUCTING AT STATION 1380 AND ANTI-ICE DUCT COUPLING CHAFFING.
Narrative: ACFT X MD80 ACFT. PROB: L-HAND PNEUMATIC XFEED DUCT CHAFFING AT STATION 1380 AND AT COUPLING OF WING/TAIL ANTI-ICE DUCT IN AFT ACCESSORY OF MD80. CHKED OTHER MD80'S AND FOUND SPACING BTWN DUCTS GREATER THAN 1 INCH, AND BTWN DUCT AND STATION 1380 GREATER THAN 5/8 INCH. OPERATING TEMP AND PRESSURE OF XFEED DUCT IS 450-490 DEGS F AND 80 PSI WHICH COULD CAUSE AIRFRAME DAMAGE TO STATION 1380 IF DUCT SHOULD CHAFF THROUGH DUCT WALL. CHAFFING COULD ALSO CAUSE A FIRE IN AFT ACCESSORY COMPARTMENT. DISCREPANCY WRITTEN ON 'A' CHK CARD.
Data retrieved from NASA's ASRS site as of July 2007 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.