Three days before the first winter airmail（航空邮件）/'eəmeɪl/ flight, engineer Nara Bell refused to certify Red Dune（沙丘）/djuːn/ Airfield（机场）/'eəfiːld/. The project brochure called the site an aerospace（航空航天的）/'eərəspeɪs/ centre for cosmic（宇宙的）/'kɒzmɪk/ research, orbital（轨道跟踪的）/'ɔːbɪt(ə)l/ tracking, supersonic（超音速的）/suːpə'sɒnɪk; sjuː-/ trials, and even spacecraft（航天器）/'speɪskrɑːft/ support. Its aeronautics（航空学）/ˌeərəˈnɔːtɪks/ laboratory also advertised public aerobatics（特技飞行）/ˌeərəˈbætɪks/. None of those claims answered the immediate question: could an ordinary aeroplane（飞机）/'eərəpleɪn/ make a safe landing（着陆）/'lændɪŋ/ and deliver medicine? In light of（鉴于）/ɪn laɪt əv/ the inspection, Nara had to test the airstrip（简易跑道）/'eəstrɪp/ rather than（而不是）/ˈrɑːðə ðæn/ approve it from promotional drawings.

The remote site stood beside a dune on a scenic（景色优美的）/'siːnɪk/ plateau. A windmill（风力机）/'wɪn(d)mɪl/ and a small hydroelectricity（水力发电）/ˌhaɪdrəʊɪˌlekˈtrɪsəti/ plant supplied power after crews electrified（接通电力）/ɪ'lektrɪfaɪ/ the prefabricated（预制的）/priː'fæbrɪkeɪt/ hangar（机库）/'hæŋə/. However, unfinished earthwork（土方工程）/'ɜːθwɜːk/ had left a dip beneath the tarmac（柏油跑道面）/'tɑ:mæk/. The airy（通风的）/'eərɪ/ office was comfortable, while a cold draught（穿堂风）/drɑːft/ crossed the fuel room because a loose fixture（固定装置）/'fɪkstʃə; -tjə/ held its door open, leaving it draughty（有穿堂风的）/'drɑːftɪ/. During a monsoon（季风雨季）/mɒn'suːn/, water could enter if the door remained open; during a blizzard（暴风雪）/'blɪzəd/, drifting snow could block the same opening. Both conditions reduced safe throughput（通行能力）/ˈθruːpʊt/ and made the building less productive（投入有效使用的）/prə'dʌktɪv/.

The mechanical check exposed another weakness in the fuel room. A compressor（压缩机）/kəm'presə/ fed the ventilation（通风系统）/,ventɪ'leɪʃ(ə)n/ duct, but its damper（风门）/'dæmpə/ remained shut and the ventilator（通风机）/'ventɪleɪtə/ moved little air. An oily（沾有油污的）/'ɒɪlɪ/ film covered a radiator（散热器）/'reɪdɪeɪtə/, and a cracked insulator（绝缘体）/'ɪnsjʊleɪtə/ sat beside the emergency dynamo（发电机）/'daɪnəməʊ/. One tank held refined（精炼的）/rɪ'faɪnd/ kerosene（煤油燃料）/'kerəsiːn/ for the aircraft; an unmarked can contained gasoline（汽油）/'gæsəliːn/ for ground equipment. The troubleshooter（故障检修员）/'trʌbl,ʃu:tə/ said the hitch（故障）/hɪtʃ/ was repairable（可修复的）/ri'pεərəbl/, but the two fuels had to be separated before any engine started.

After repairs, flier（飞行员）/'flaɪə/ Tomas Reed began the test. He fastened his seatbelt（安全带）/si:tbelt/, cleaned the windscreen（风挡玻璃）/'wɪn(d)skriːn/, and checked visibility（能见度）/vɪzɪ'bɪlɪtɪ/. A steady headwind（逆风）/'hɛdwɪnd/ assisted the approach, although a sudden gust（阵风）/gʌst/ struck near the hangar. A small whirlwind（旋风）/'wɜːlwɪnd/ crossed the far end, so Tomas held position until it passed. Nara then told him, “There is no reason to（没有理由做）/nəʊ ˈriːzən tuː/ choose between（在两者之间选择）/tʃuːz bɪˈtwiːn/ a cautious descent（下降进场）/dɪ'sent/ and an accurate landing. Use both, and do not perform aerobatics over the field.” Tomas adjusted his route and touched down beyond the repaired dip.

At this stage（现阶段）/æt ðɪs steɪdʒ/, the team tested the real cargo in question（所涉及的）/ɪn ˈkwestʃən/. A courier（快递员）/'kʊrɪə/ brought a satchel（邮袋）/'sætʃ(ə)l/ of letters, a pouch（小袋）/paʊtʃ/ containing postage（邮资记录）/'pəʊstɪdʒ/ records, and an icebox（保温箱）/'aɪsbɒks/ of medicine from a transportation（运输）/trænspɔː'teɪʃ(ə)n; trɑːns-/ depot. The hangar freezer（冷冻柜）/'friːzə/ kept the medicine cold, and the nearby transfer area felt chilly（冷飕飕的）/'tʃɪlɪ/ while inspectors checked the seals. Staff then sorted the airmail and placed the first delivery notice in the town mailbox（邮箱）/'meɪlbɒks/. The exercise measured loading time and storage temperature instead of relying on the project's grand claims.

On that basis（据此）/ɒn ðæt ˈbeɪsɪs/, Nara issued a certificate in accordance with（按照）/ɪn əˈkɔːdəns wɪð/ the verified limits. It no longer（不再）/nəʊ ˈlɒŋɡə/ promoted the field under the name of（以……的名义）/ˈʌndə ðə neɪm əv/ a space centre. The document approved daytime postal landing, required weather checks, and listed the ventilation and fuel controls that must remain operational. The aeroplane departed with empty containers and returned on schedule the next morning. The observable result was practical: mail arrived and medicine stayed cold, so the town accepted the airfield as reliable infrastructure.