This article discusses BEA's intent to study the reasons for not detecting the pingers in 2009. It also contains an initial comment from Honeywell.
and this ids the Honeywell part :
Although the beacon and memory cylinder of the data recorder separated from the device's chassis, manufacturer Honeywell said it is not looking at amending the design, pointing out that it meets regulatory and OEM requirements.
That's a funny statement as, as far as we are concerned :the most likely culprits are the Pitot probes, which also "met regulatory requirements, i.e. certification criteria, but still failed.