M811B, 811B, Davtron Aircraft Digital Chronometer w/ Serv tag
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14V Davtron Aircraft Digital Chronometer w/ Serviceable tag, (Davtron 11/97). P/N M811B or 811B. External battery will have to be replaced due to its age. Specs are:
 | Digital clock |
| Flight time recorder |
| Elapsed time meter |
| Three independent 24-hr. six-digit (hours, minutes, seconds) solid state timing circuits |
| Bright incandescent display |
| Clock is set at factory to accurate (W.W.V.) |
| Flight time starts on takeoff |
| Elapsed time is controlled by pilot |
| All three functions have a memory FAA-PMA approved |
| Condition Code | |
| Condition | SV |