Airline KLM has experienced problems with altitude meters on Boeing aircraft 17 times over the past six months, reports BNR radio quoting confidential documents.

A faulty altitude meter is thought to be the cause of last month’s fatal crash of a Turkish Airlines Boeing 737 just before landing at Amsterdam’s Schiphol airport.
KLM staff feel that every 737 in its fleet should be checked, says BNR.
An airline spokesman told the radio station that the company is not aware of any problems at the moment and would not comment on whether there had been problems in the past.
In their preliminary report on the crash, in which nine people died, accident investigators said a faulty altitude meter had led to the engine shutting down. The plane was being flown on automatic pilot.
Meanwhile, the Telegraaf reports that prominent air accident specialist and lawyer Frans Vreede is heading up a legal team looking into the possibility of making a claim against Boeing for negligence.