Page:Report of the Board of Inquiry into the Helderberg air disaster.djvu/42

Rh alert. The aerodrome was not equipped with surveillance radar and only runway 14 was equipped with an ILS.

1.11 Flight Recorders

The following recorders were fitted:

(1) Penny and Giles quick access recorder (QAR) type D50761 for logging flight data. The QAR was mounted in the main equipment bay just forward of the lower cargo hold at station 460. This recorder was not recovered.

(2) Lockheed model 209F digital flight data recorder (DFDR) Part no. 10077 A500 - 803 fitted with a Dukane N15F210B underwater locator beacon. The DFDR was mounted on top of a stowage facility in the left hand rear side of the main deck cargo compartment at station 2320. This recorder was not recovered.

(3) Collins type 642 C-1 cockpit voice recorder (CVR) Part no. 522 - 4057 -002 fitted with a Dukane N15F210B underwater locator beacon. The CVR was mounted next to the DFDR and was the only recorder found and recovered from the sea bed.

After the CVR was found it was handled with great care and all possible precautions were taken to ensure that the recorded information would be retained. To prevent the formation of air bubbles on the tape and hence a