Announcement

Collapse
No announcement yet.

Another unreilable airspeed mishandling

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Another unreilable airspeed mishandling

    Aviation Herald - News, Incidents and Accidents in Aviation


    When the aircraft climbed through about FL120 at 275 KIAS the crew noticed a hot air balloon dragging a plastic banner which contacted the aircraft. Immediately afterwards all airspeed indications disagreed and autopilot and autothrust disconnected, messages "MAINTENANCE STATUS F/CTL", "NAV ADR DISAGREE", "F/CTL ALTN LAW", "AUTO FLT AP OFF", "AUTO FLT A/THR OFF" and "NAV ALTI DISCREPANCY" were shown on ECAM. The captain instructed the first officer to disregard the "NAV ADR DISAGREE" message and did not inform Air Traffic Control. The crew attempted to reconnect the flight directors and autopilot however without success. The crew partially executed the unreliable speed checklists - while the first officer read the checklist the commander switched the ADR data sources and identified ADR3 as not working, the crew however did not rearrange the systems to use ADR1 and ADR2 instead. Subsequently the crew referred to the pitch/power tables using an aircraft weight of 66 tons although the actual aircraft weight was 54 tons and the table for 56 and less tons should have been used. Although the aircraft was no longer compliant with requirements for RVSM airspace, the crew did not notify ATC and continued the climb manually into RVSM airspace levelling off at FL310. Throughout the flight a multitude of alerts regarding deviations from altitude and heading occurred. During the descent air traffic control complained the aircraft was 1nm off track and queried whether they would be able to conduct an ILS approach to Belo Horizonte. The crew configured the aircraft for flaps on the ILS approach to Belo Horizonte's runway 13, the captain identified the speed indications of left and right PFD disagreed by more than 10 knots with the first officer's instrument showing the higher value, the captain decided to use the first officer's indications without checking whether his or the first officer's indications were more reliable.
    Originally posted by CENIPA
    The investigation could not decide whether the crew continued the flight into RVSM airspace, onto a RNAV approach and onto an ILS approach without required systems being available because of forgetfulness or ignorance.
    Brilliant!

    --- Judge what is said by the merits of what is said, not by the credentials of who said it. ---
    --- Defend what you say with arguments, not by imposing your credentials ---

  • #2
    Originally posted by CENIPA
    The investigation could not decide whether the crew continued the flight into RVSM airspace, onto a RNAV approach and onto an ILS approach without required systems being available because of forgetfulness or ignorance.
    Or lack of memoryness. One of the first things on the checklist is to switch off the flight directors, and yet they were trying to get them back online. four years since AF447 and nothing seems to have changed.

    Comment


    • #3
      Originally posted by Evan View Post
      Or lack of memoryness.
      Or inability to remember.
      Or failure to recall.
      Or...
      Originally posted by CENIPA
      The investigation could not decide whether the crew continued the flight into RVSM airspace, onto a RNAV approach and onto an ILS approach without required systems being available because of forgetfulness or ignorance.

      --- Judge what is said by the merits of what is said, not by the credentials of who said it. ---
      --- Defend what you say with arguments, not by imposing your credentials ---

      Comment


      • #4
        Please, just tell me that their destination was the closest, biggest airport with the bestest weather.
        Les règles de l'aviation de base découragent de longues périodes de dur tirer vers le haut.

        Comment


        • #5
          I don't get it - did they continue their flight without envelope protections and without AP?

          And had to approach in Direct Law after lowering the gear?

          This sounds adventurous.

          Comment

          Working...
          X