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performed by the crew, and it felt that this review greatly aided the smooth completion of first-day activities. 

The CDR provided a running commentary throughout the ascent phase, which was considered essential to keeping those crewmen on the the middeck appraised of the progress of the flight. 

ORBIT [[UNDERLINED]]

Adaption [[underlined]]. The 41-D crew observed, during their adaption to zero-g, the same learning curve as has been reported by previous flightcrews. The post-insertion timeframe has been laid out preflight to require minimum movement about the flightdeck for the ascent crew. This seemed to work well in flight, and the post-insertion activities were accomplished on time. It was the observation of the crew that that toe-holds affixed to the Orbiter prelaunch was mandatory for early on-orbit operations, particularly in view of the inefficiency which normally results during the course of adaption to zero-g. Subsequent crews should verify that sufficient toe-holds are installed prelaunch in the appropriate places.

Communications [[underlined]]. The 41-D crew had trained in the SMS with the speaker/microphone communications set-up, and that configuration was established early in the post-insertion timeframe. The air-to-ground through the Orbiter speakers was loud and clear on both the flightdeck and the middeck. Based on the ground reports post-flight, the downlink voice through the handheld microphone would have been helpful. All in all, it was felt that these relatively minor annoyances were a small enough price to pay for the convenience of not having to wear either an HIU or a WCCU. As an aside, it was the opinion of the 41-D crew that Discovery was quieter than we had all expected. It was certainly quieter than the SMS and, by all accounts, probably quieter than the other Orbiters. This fact certainly helped to make using the speaker/microphone feasible. 

Cabin Debris and Filter Cleaning [[underlined]]. Since STS 41-D was the first flight of OV-103, we had expected to find a larger-than-normal amount of cabin debris. Immediately after MECO we observed a washer floating freely at the forward flightdeck. This observation proved to be a precursor of the large amount of hardware we would later find in the filters. At payloud bay door opening, we observed a large amount of debris floating freely in and out of the cargo bay. We were a bit surprised to find that debris was still coming from the payloud bay several days later. In fact, on flight day 5, we observed what appeared to be a roll or new, unwrapped tape floating free in the payload bay. 

The cabin fan filters were first inspected on flight day 2. The CDR performed the inspection and cleaning and found the canonical blue lint and some amount of hardware (nuts and bolts). The quantity of material found on the cabin fan filter motivated an inspection of the DEU filters on the same time. In addition to the lint, the CDR found a large quantity of hardware. The PLT performed the IMU fan filter cleaning on flight day 2 as well and found the filters to be covered with lint. We also found that it was easy to clean the IMU fan filters on OV-103 by